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: 6,696  Serials: 68,299  Visitors: 74,156,004  Members: 5,620  Photos: 43,827  Lat/Lng: 37,400  Masks: 68,299(1,020.00%)  Traits: 572  Nudges: 222,342  Backglasses: 1,865
  Most Serials: Twilight Zone(1,305)  Most Submissions: Dennis Braun(6,100)  Most Points: Dennis Braun(45,409)  Highest Quality: The Knight(17.00)  Most Nudges: pinballservice-nl(28,209)
Road Kings - IPSND/IPDB No. 1970 - July 1986
Backglass Image
Manufacturer: Williams Electronic Games, Inc., a subsidiary of WMS Inc.
Players: 4
MPU: Williams System 11
Production Run: 5,500
Game Type: Solid State Electronic (SS)
Model: 542
Submissions: 159 serials of 5,500 (2.89%)
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.

6,027 (109.58%) linear / 4,958(90.15%) in 3 clusters 275 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
Inlane Insert Numbers Some games may have the left inlane insert as '3' and the right inlane insert as '4', while other games may have the left one as '4' and the right one as '3'. Jay St@fford12/20/201317

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
33079 54247681 Display/Driver Rod McLarge Canada flag Canada
23773 54247705 Display/Driver John Vorwerk United States flag United States
54654 54247743 MPU/CPU Dennis Braun United States flag United States
10925 54247746 Display/Driver John Duchi United States flag United States
36307 54247826 Sound Board John Vorwerk United States flag United States
52856 54247827 Flipper Board Dennis Braun United States flag United States
62072 54247843 Power Supply Dennis Braun United States flag United States
31907 54247909 Power Supply Pistol Pete United States flag United States
79393 54247943 MPU/CPU Fun House United States flag United States
49297 54248020 MPU/CPU Dennis Braun United States flag United States
72508 54248089 Coin Door Dennis Braun United States flag United States
56910 54248294 Coin Door Rod McLarge United States flag United States
33651 54248311 Flipper Board Rod McLarge United States flag United States
48115 54248335 Display/Driver Dennis Braun United States flag United States
48378 54248398 Display/Driver Rod McLarge Canada flag Canada
42152 54248482 Sound Board John Vorwerk United States flag United States
56090 54248504 Display/Driver Dennis Braun United States flag United States
42388 54248615 Display/Driver Rod McLarge United States flag United States
28185 54248706 Display/Driver John Vorwerk United States flag United States
67475 54248735 Other/Unknown Mark Hoffman United States flag United States
27798 54248739 Display/Driver Pistol Pete United States flag United States
48539 54248773 Display/Driver Rod McLarge United States flag United States
80031 54248799 Display/Driver Dennis Braun United States flag United States
48540 54248866 Display/Driver Rod McLarge United States flag United States
52860 54248871 Coin Door Dennis Braun United States flag United States
66595 54248922 Display/Driver Dennis Braun United States flag United States
66594 54248925 Display/Driver Dennis Braun United States flag United States
28406 54248927 Display/Driver John Vorwerk United States flag United States
56644 54249006 Sound Board Dennis Braun United States flag United States
50565 54249179 Coin Door Dennis Braun United States flag United States
61503 54249188 Flipper Board Dennis Braun United States flag United States
67726 54249230 Power Supply Dennis Braun United States flag United States
65996 54249242 MPU/CPU Dennis Braun United States flag United States
64329 54249283 MPU/CPU Dennis Braun United States flag United States
53006 54249379 Sound Board Rod McLarge Canada flag Canada
51843 54249379 Sound Board John Vorwerk United States flag United States
25296 54249386 Display/Driver John Vorwerk United States flag United States
47310 54249391 Sound Board Rod McLarge United States flag United States
36509 54249451 MPU/CPU Rod McLarge United States flag United States
8625 54249451 Other/Unknown Bill Ung United States flag United States
24677 54249508 Sound Board John Vorwerk United States flag United States
48830 54249522 Flipper Board Rod McLarge United States flag United States
42165 54249615 MPU/CPU Rod McLarge United States flag United States
42080 54249656 Coin Door Rod McLarge United States flag United States
28393 54249656 Sound Board Jess Askey United States flag United States
32108 54249680 Display/Driver Rod McLarge United States flag United States
56338 54249737 MPU/CPU Dennis Braun United States flag United States
34317 54249805 Sound Board Rod McLarge United States flag United States
49983 54250062 Display/Driver Rod McLarge Germany flag Germany
25025 54250153 Flipper Board John Vorwerk United States flag United States
67017 54250214 Display/Driver Dennis Braun United States flag United States
47972 54250278 MPU/CPU Rod McLarge United States flag United States
8626 54250329 Other/Unknown Bill Ung United States flag United States
26882 54250383 Display/Driver John Vorwerk United States flag United States
78308 542I45073 Power Supply Dennis Braun United States flag United States
12200 542I45154 MPU/CPU Leo Stelloo Netherlands flag Netherlands
13700 542I46362 Display/Driver Peter Lukats Hungary flag Hungary
60612 542I46389 Power Supply Fun House Germany flag Germany
68226 542I46439 Sound Board Fun House Netherlands flag Netherlands
51054 542I46600 MPU/CPU Fun House Germany flag Germany
13701 542I46740 Display/Driver Peter Lukats Hungary flag Hungary
34757 542I46782 MPU/CPU Adam Pretorius South Africa flag South Africa
65409 542I46825 MPU/CPU Fun House Germany flag Germany
54643 542I47103 Power Supply 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 54247725, 54247732, 54247799 ^(542)(?<sortdata>[0-9][0-9][0-9][0-9][0-9])$ True
International Game 54I250380, 54I250329, 54I250270 ^(542)(I)(?<sortdata>[0-9][0-9][0-9][0-9][0-9])$ True
Experimental Game 54X250380, 54X250329, 54X250270 ^(542)(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...