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: 68,496  Visitors: 74,357,433  Members: 5,632  Photos: 44,011  Lat/Lng: 37,563  Masks: 68,496(1,022.94%)  Traits: 572  Nudges: 223,264  Backglasses: 1,865
  Most Serials: Twilight Zone(1,307)  Most Submissions: Dennis Braun(6,104)  Most Points: Dennis Braun(45,438)  Highest Quality: The Knight(17.00)  Most Nudges: pinballservice-nl(28,311)
Dirty Harry - IPSND/IPDB No. 684 - March 1995
Backglass Image
Manufacturer: Williams Electronic Games, Inc., a subsidiary of WMS Inc.
Players: 4
MPU: Williams WPC Security (WPC-S)
Production Run: 4,248
Game Type: Solid State Electronic (SS)
Model: 50030
Submissions: 218 serials of 4,248 (5.13%)
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.

4,685 (110.29%) linear / 4,685(110.29%) in 1 clusters 212 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
Warehouse Entrance Drop Target Some games have a drop target with a decal of a red door in front of the warehouse entrance. Other playfields do not have this drop target at all. Jess Askey1/15/200977

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
65280 50230110038 Solenoid Driver Dennis Braun United States flag United States
60707 50230110343 Sound Board Fun House Germany flag Germany
49300 50230110636 MPU/CPU Dennis Braun United States flag United States
32870 50230113251 Display/Driver Rod McLarge Poland flag Poland
49434 50330113254 Coin Door Dennis Braun United States flag United States
67351 50330113357 MPU/CPU Dennis Braun United States flag United States
10560 50330113371 Solenoid Driver John Duchi United States flag United States
61796 50330113397 Display/Driver Fun House Slovenia flag Slovenia
10534 50330113397 Flipper Board John Duchi United States flag United States
56749 50430110905 Flipper Board Fun House Netherlands flag Netherlands
56848 50430111980 Flipper Board Fun House United Kingdom flag United Kingdom
65243 50730111387 Display/Driver Fun House Germany flag Germany
62821 50730111502 Display/Driver Dennis Braun United States flag United States
68202 50730113363 Display/Driver Dennis Braun United States flag United States
49762 51030110468 Display/Driver Fun House Korea, Democratic People's Republic of flag Korea, Democratic People's Republic of
72437 51030110923 Display/Driver Alexander Visotin Australia flag Australia
48094 51030111122 Flipper Board Antti Peltonen Finland flag Finland
65505 51030112943 Flipper Board Clive Pedersen United Kingdom flag United Kingdom
59538 51030112957 Display/Driver Antti Peltonen Finland flag Finland
42519 51030113037 Display/Driver Antti Peltonen Finland flag Finland
69439 51030113088 MPU/CPU Clive Pedersen United Kingdom flag United Kingdom
69438 51030113088 MPU/CPU Clive Pedersen United Kingdom flag United Kingdom
53475 51330111464 Display/Driver Fun House Germany flag Germany
50251 51330111552 MPU/CPU Fun House Germany flag Germany
41339 51330111584 MPU/CPU Rod McLarge United States flag United States
77666 51430110551 Display/Driver Alexander Visotin Australia flag Australia
71268 51430110720 Display/Driver Fun House Italy flag Italy
49777 51430112561 Display/Driver Fun House Korea, Democratic People's Republic of flag Korea, Democratic People's Republic of
76521 51430112664 MPU/CPU Fun House Italy flag Italy
58471 52030112095 Display/Driver Fun House United States flag United States
33860 52030112132 Flipper Board Pistol Pete United States flag United States
76357 52230110821 Display/Driver Fun House Italy flag Italy
67542 52230110954 Display/Driver Fun House Germany flag Germany
48707 52230111060 Display/Driver Fun House Korea, Democratic People's Republic of flag Korea, Democratic People's Republic of
70800 52230111080 Display/Driver Fun House Italy flag Italy
70478 52230111090 Display/Driver Fun House Italy flag Italy
70319 52530110203 MPU/CPU Antti Peltonen Hungary flag Hungary
62960 52830111991 Display/Driver Dennis Braun United States flag United States
47993 53330110022 Power Supply Dennis Braun United States flag United States
65789 53330110058 Display/Driver Fun House United States flag United States
67038 53330110128 Sound Board Dennis Braun United States flag United States
56103 53330112259 Display/Driver Fun House United States flag United States
68363 53330113214 MPU/CPU Dennis Braun United States flag United States
77035 53330113338 Display/Driver Charles P United States flag United States
63071 53330113540 Display/Driver Dennis Braun United States flag United States
57985 53330113543 Solenoid Driver Dennis Braun United States flag United States
63070 53330113642 Display/Driver Dennis Braun United States flag United States
51859 53330113662 Display/Driver John Vorwerk United States flag United States
52241 53330113831 Display/Driver Rod McLarge United States flag United States
67064 53330113874 Display/Driver Dennis Braun United States flag United States
63120 53330113874 Display/Driver Dennis Braun United States flag United States
34706 53330113886 Solenoid Driver Antti Peltonen Finland flag Finland
59899 53330113896 Display/Driver Fun House United States flag United States
50256 53330113914 Display/Driver Fun House United States flag United States
66183 53330113947 Coin Door Dennis Braun United States flag United States
57570 53330114020 Display/Driver Fun House United States flag United States
74488 53330114050 MPU/CPU Dennis Braun United States flag United States
43782 53330114122 Display/Driver Rod McLarge United States flag United States
58258 53330114380 Solenoid Driver Dennis Braun United States flag United States
57573 53330114380 Flipper Board Dennis Braun United States flag United States

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 51730110117, 51730114295, 53330110044 ^(5[0-9][0-9]30)(?<sortdata>[0-9][0-9][0-9][0-9][0-9][0-9])$ True
International Game 53330I114685, 53330I114580, 53330I114547 ^(5[0-9][0-9]30)(I)(?<sortdata>[0-9][0-9][0-9][0-9][0-9][0-9])$ True
Experimental Game 53330X114685, 53330X114580, 53330X114547 ^(5[0-9][0-9]30)(X)(?<sortdata>[0-9][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...