The Internet Pinball Serial Number Database or IPSND collects serial numbers of pinball machines and publishes a database of these on the Internet. Our goal is to make available a registration of all pinball machines in existence and allow tools for slicing, dicing and visualization of the data.

Games: 6,217  Serials: 51,429  Visitors: 31,577,998  Members: 3,814  Photos: 28,266  Lat/Lng: 25,095  Masks: 51,429(827.23 %)  Traits: 505  Nudges: 143,767  Backglasses: 1,862
  Most Serials: Twilight Zone(1,071)  Most Submissions: Dennis Braun(3,732)  Most Points: Rod McLarge(27,987)  Highest Quality: Jim Butler(9.15)  Most Nudges: King of Pinball(19,321)
PIN·BOT - IPSND/IPDB No. 1796 - October 1986
Backglass Image
Manufacturer: Williams Electronic Games, Inc., a subsidiary of WMS Inc.
Players: 4
MPU: Williams System 11A
Production Run: 12,001
Game Type: Solid State Electronic (SS)
Model: 549
Submissions: 435 serials of 12,001 (3.62 %)
Coverage help:

Coverage is a mathematical interpretation of the serial numbers that have been submitted so far. The term 'coverage' relates to the amount of the production run that has been 'covered' in the given submissions.

There are two coverage methods shown, each has a different approach of calculating an guess on the number of games produced by analysing the currently submitted serial numbers.

Linear: Linear coverage simply looks at the highest serial number and subtracts from it the smallest serial number to estimate the number of games produced. For some games, this works fine because the serial numbers were sequential and without gaps (Early Bally, Early Stern, etc). However, this approach starts to fail quickly for games that serial numbers are part of a bigger numbering scheme (Williams pre 1984, Current Stern) or that intentially had gaps/skips in the numbering sequence(Gottlieb post 1960). If you see a linear coverage number that is higher than the known production run, it is probably not the best way to look at the serial range and you should look at the clustered approach below.

Clustered: Clustered coverage assumes that there are gaps/skips in the serial sequence for a game. It groups the serial numbers together based upon how close they are to the next serial number in the sequence. If they fall within a certain threshold then the SerialBot assumes that there are valid serial numbers between the two. If they are far enough apart, then the SerialBot assumes this is a gap. Once all the gaps and groups are determined, it sums up all the linear ranges in each group. This way, if a sample run of games started at 15,000-15,100 and the production games started at 17,000 onwards, it would assume that the serial numbers between 15,100-17,000 were a gap an are not counted. Using this method, as more serial numbers are submitted the gap analysis will get more accurate.

12,223 (101.85 %) linear / 12,223(101.85 %) in 1 clusters 600 wide.
Cluster Serial Number SerialBot Submitted By Country Game Part

Submit a new Game Trait

The following traits help

Game Traits are properties for an individual game that you would like to see tracked along with the other information gathered for a serial number submission. Some examples of existing traits are... Joust: Black or Blue bottom Arch, Black Knight: Faceted Inserts or Normal Inserts, Twilight Zone: 3rd Magnet Installed or not.

have been submitted for this game...

Field NameDescriptonSubmitted BySubmit DateSubmitted
There are no traits submitted for this game

Cluster Serial Number Country

This section lists any known game part serials that happen to match this game's serial mask (if defined). What this can tell you is if a game has any orphaned parts that might exist in other machines. This generally applies to CPU/MPU boards, Driver Boards, Display boards etc that are easily moved from game to game. Repair shops and distributors often robbed parts from other 'scrap' games laying around in a pinch if they were not able to fix the original part or of the original part was damaged beyond repair. If serials start showing up in the database as 'game parts', there is potentially a good chance that that game has been parted out completely, which is unfortunate. It is becoming more and more common for people to part out games and sell them on ebay simply because the seller can often make more money that way.... Please do not sacrifice complete games for money!!!

SerialBotSerial NumberTypeSubmitted ByCountryDetails
34911 54901576 Display/Driver John Vorwerk United States flag United States
60900 54901685 Power Supply Dennis Braun United States flag United States
56469 54901692 Display/Driver Dennis Braun United States flag United States
53428 54901767 MPU/CPU Dennis Braun United States flag United States
58863 54901824 Display/Driver Dennis Braun United States flag United States
61013 54901917 Power Supply Dennis Braun United States flag United States
32771 54901961 Flipper Board Rod McLarge United States flag United States
20451 54902023 Sound Board John Vorwerk United States flag United States
55949 54902140 Power Supply Dennis Braun United States flag United States
42387 54902183 Flipper Board Rod McLarge United States flag United States
10815 54902293 Display/Driver John Duchi United States flag United States
42526 54902304 Display/Driver Rod McLarge United States flag United States
10825 54902451 Display/Driver John Duchi United States flag United States
49817 54902459 Display/Driver Dennis Braun United States flag United States
52245 54902918 Display/Driver Rod McLarge United States flag United States
35458 54903895 Power Supply John Vorwerk United States flag United States
35755 54903971 Display/Driver Rod McLarge Canada flag Canada
48431 54904140 Sound Board Dennis Braun United States flag United States
60906 54904488 Display/Driver Dennis Braun United States flag United States
62686 54904490 Display/Driver Dennis Braun United States flag United States
61528 54904498 Power Supply Dennis Braun United States flag United States
59282 54904521 Display/Driver Dennis Braun United States flag United States
58019 54904523 Display/Driver Dennis Braun United States flag United States
59280 54904541 Display/Driver Dennis Braun United States flag United States
28450 54904551 Solenoid Driver Jess Askey United States flag United States
34971 54904669 Display/Driver John Vorwerk United States flag United States
14600 54904859 MPU/CPU Matthew LaVoice United States flag United States
47974 54904950 Sound Board Rod McLarge United States flag United States
12217 54904980 Display/Driver Jess Askey United States flag United States
60962 54905065 Sound Board Dennis Braun United States flag United States
11358 54905120 MPU/CPU Pinball Pete United States flag United States
20479 54905229 Flipper Board John Vorwerk United States flag United States
14599 54905362 Display/Driver Matthew LaVoice United States flag United States
59281 54905371 Display/Driver Dennis Braun United States flag United States
10045 54905385 Other/Unknown Bill Ung United States flag United States
56272 54905460 Other/Unknown Rod McLarge United States flag United States
8695 54905467 Power Supply Jess Askey United States flag United States
59995 54905505 MPU/CPU Dennis Braun United States flag United States
17388 54905513 Display/Driver John Vorwerk United States flag United States
42112 54906443 Flipper Board John Vorwerk United States flag United States
30686 54906453 Sound Board John Vorwerk United States flag United States
10812 54906623 Flipper Board John Duchi United States flag United States
62310 54906656 Power Supply Dennis Braun United States flag United States
57202 54906670 Display/Driver Dennis Braun United States flag United States
59994 54906727 MPU/CPU Dennis Braun United States flag United States
8618 54906777 Other/Unknown Bill Ung United States flag United States
27459 54906781 Display/Driver John Vorwerk United States flag United States
10891 54906821 Display/Driver Jess Askey United States flag United States
52242 54906854 Display/Driver Rod McLarge United States flag United States
56455 54906883 Display/Driver Fun House United States flag United States
54752 54907017 Display/Driver Rod McLarge Canada flag Canada
37929 54907063 Sound Board Rod McLarge United States flag United States
56948 54907070 MPU/CPU Fun House United States flag United States
37642 54907224 Flipper Board John Vorwerk United States flag United States
59159 54907568 Power Supply Dennis Braun United States flag United States
27817 54907691 Display/Driver Pistol Pete United States flag United States
36368 54907692 Coin Door Adam United States flag United States
50177 54907717 MPU/CPU Dennis Braun United States flag United States
60916 54907719 Flipper Board Dennis Braun United States flag United States
30861 54907752 MPU/CPU Pistol Pete United States flag United States
56806 54907844 Display/Driver Dennis Braun United States flag United States
56248 54907909 Power Supply Dennis Braun United States flag United States
50421 54907974 Flipper Board Dennis Braun United States flag United States
61385 54908028 Display/Driver Dennis Braun United States flag United States
48824 54908064 Display/Driver Rod McLarge United States flag United States
49793 54908243 MPU/CPU Dennis Braun United States flag United States
62300 54908260 Display/Driver Dennis Braun United States flag United States
57628 54908302 Power Supply Rod McLarge United States flag United States
27622 54908302 Display/Driver John Vorwerk United States flag United States
61505 54908368 Sound Board Dennis Braun United States flag United States
23604 54908369 Power Supply John Vorwerk United States flag United States
56715 54908383 Power Supply John Vorwerk United States flag United States
56662 54908383 Power Supply Dennis Braun United States flag United States
61782 54908450 Display/Driver Dennis Braun United States flag United States
36505 54908476 Sound Board Rod McLarge United States flag United States
62335 54908700 MPU/CPU Dennis Braun United States flag United States
37643 54908770 Power Supply John Vorwerk United States flag United States
36306 54908971 Display/Driver John Vorwerk United States flag United States
63124 54909102 Flipper Board GameTime United States flag United States
56764 54910291 Coin Door Dennis Braun United States flag United States
47973 54910406 Display/Driver Rod McLarge United States flag United States
47868 54910406 Display/Driver Dennis Braun United States flag United States
32636 54910470 Display/Driver Rod McLarge United States flag United States
32170 54910578 Display/Driver Rod McLarge United States flag United States
60902 54910600 MPU/CPU Dennis Braun United States flag United States
27454 54910631 Display/Driver Ric Turner United States flag United States
61578 54911373 Sound Board John Vorwerk United States flag United States
10753 54911574 MPU/CPU John Duchi United States flag United States
60915 54911612 MPU/CPU Dennis Braun United States flag United States
24657 54912364 Display/Driver 4By United States flag United States
61009 54912421 Power Supply Dennis Braun United States flag United States
20480 54912510 Flipper Board John Vorwerk United States flag United States
47231 54912612 Coin Door Rod McLarge United States flag United States
27300 54912613 Flipper Board John Vorwerk United States flag United States
21249 54912689 Sound Board John Vorwerk United States flag United States
56949 54912835 Display/Driver Fun House United States flag United States
28759 54912890 Power Supply John Vorwerk United States flag United States
60961 54912904 Sound Board Dennis Braun United States flag United States
42072 54912911 Flipper Board John Vorwerk United States flag United States
56944 549I03102 Display/Driver Fun House United States flag United States
60480 549I03133 Display/Driver Fun House Germany flag Germany
26034 549I03448 MPU/CPU pinballservice-nl Netherlands flag Netherlands
42008 549I03692 Display/Driver Antti Peltonen Hungary flag Hungary
41986 549I03692 Sound Board Antti Peltonen Hungary flag Hungary
31095 549I03692 Display/Driver Antti Peltonen Hungary flag Hungary
24456 549I05716 MPU/CPU Olivier Rannou France flag France
58059 549I09224 Power Supply Dennis Braun United States flag United States
48124 549I09373 Power Supply Dennis Braun United States flag United States
62425 549I09469 Display/Driver Fun House Germany flag Germany
35692 549I10982 Sound Board Rod McLarge United States flag United States
27929 549I12022 Sound Board pinballservice-nl Netherlands flag Netherlands
42460 549I12029 Coin Door Rod McLarge United States flag United States
39149 549I13355 Power Supply Antti Peltonen Finland flag Finland
35664 549I13366 Power Supply Antti Peltonen Finland flag Finland
26915 549I13465 Flipper Board John Vorwerk United States flag United States
48928 549I13610 Sound Board Fun House Korea, Democratic People's Republic of flag Korea, Democratic People's Republic of

This section lists any known information about how to physically find serial numbers on games created by this manufacturer. For all manufacturer tips, please visit the Serial Tips Page . (Please do not post serial numbers here on this form.)

Posted 1/11/2007 11:54:45 PM by Bill Ung

Newer Williams and Williams/Bally games have cute little stickers everywhere. This began with System 9 games (as far as I know) and include game ID number information, as well as the serial number. There are two styles:

  • The blue/grey and white stickers ran through the Hurricane era. These include the official game ID number (ie: 541 or 50018), separated from the actual serial number by a few spaces. Early games, till about the end of 1986, had five-digit serial numbers. Since then, serial number have always been six digits.
  • The white stickers include encoded game ID numbers. Well, the ID numbers aren't identical to the one you'll find in the ROM, but it DOES match the game ID number listed on the back of the machine. The number may change based on country. This is an item still being debated somewhat.

Overall, you'll find these stickers on the fronts of the cabinets, on top of the head, on the back of the cabinet (along with an encoded manufacturing date), insi

Posted 4/28/2008 2:40:04 PM by Jim West
Pinball2000 machines have two parts each with their own serial number. The base serial number is for the playfield cabinet. This serial number is for the top unit of the pinball.
Posted 12/20/2008 10:07:35 PM by MARK SPENCER
OPEN COIN DOOR, LOOK TO RIGHT , MFG STICKER SHOULD BE ON SIDE.
Posted 2/23/2009 9:24:15 PM by Richard Harvey
Game Date Stamp for BK2K under backbox with head down.
Members can submit new tips on how to find serial numbers! Sign up for a free membership here!

This game has the following serial number formats defined in the database. As serial numbers are sumbitted, trends are recognized and defined or information about a serial number format is collected through historical information.

TypeExamplesRegExMaskLowerLimitUpperLimitAutoAssignable
Production Game 54902137, 54901539, 54901559 ^(549)(?<sortdata>[0-9][0-9][0-9][0-9][0-9])$ True
International Game 549I09686, 549I05595 ^(549)(I)(?<sortdata>[0-9][0-9][0-9][0-9][0-9])$ True
Experimental Game 549X09686, 549X05595 ^(549)(X)(?<sortdata>[0-9][0-9][0-9][0-9][0-9])$ True


The Serial Bot Summary information here gives a detailed explanation of the Serial Bot analysis for this specific game. The theory behind the Serial Bot is this...

Every game has many many serial number submissions, the goal of the IPSND is not to guarantee that *all* information is 100% correct but that over time, the system should automatically devalue inaccurate submissions while increasing the value of correct submissions.

You may click on the SerialBot score of any submission to see how it was calculated.

SerialBot Color Codes:
- Not Validated The serial number submission has not yet been validated by the submitter via email.
- Unknown There is no known information on the serial number format for this game yet. As more submissions are received we can start to make a best guess on the serial number format.
- Good If a serial does not fail any of the tests for a status of Warning or Bad, then it is good.
- Suspect A serial will have a suspect status if the format is technically correct but there is something wrong with the data. Examples might be that the number might be too high or low for the known range of serials for this game.
- Bad If a game has a serial number definition mask defined for it, then a serial may be marked as 'bad' if the number does not validate agains the mask. Masks are created for games by looking at known serial number formats and consist of a regular expression to define the format of a game serial.

SerialBot Scores:
1 Point Awarded if the serial number has a game assigned to it. This autoatically makes submissions with a known game more valuable than submissions without a known game.
1 Point Awarded if the serial number has been 'verified' by the submitter. A submission is 'verifed' if the submitter clicks on the link in the email sent to them for each submission. The basis for this rule is that submissions by people that do not take the time to respond to the email might be entering garbage data and/or giving fake email addresses. However, it is common for 'verification' emails to get stuck in spam filters etc, so, members may have 'verification' emails re-sent at any time.
1 Point Awarded if the submitted serial number matches one of the predefined serial number masks for this game.
1 Point Awarded if the serial number was marked as 'Physically Viewed' during the submission process. This is an interesting distinction as there are many times that serial numbers are submitted off owners lists, Ebay auction, etc. While these serial numbers are valuable, they may also be innacurate. In comparison, Physically Viewed serial number submissions are numbers that the submitter has actually been in front of the machine reading the number and then submitting it. Since it is more likely to get a good visual from a physically viewed machine, this gains an extra point.
1 Point If a photo is uploaded with the serial number submission. The submission automatically gains an additional point. Be aware however that this opens the submission up to 'Nudges' by members where even more points can be added or subtracted based upon the quality and accuracy of the photo.
-3 to +3 Points Members can 'Nudge' every sumitted photo once and give it an extra boost of 1 point or take away 1 point depending if the photo matches the submitted serial number. While any number of members may nudge a serial, the nudging can only affect the score by +/- 3 points in either direction.

The following map shows the locations of all serial numbers that were submitted with a geolocation...


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