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: 6,133  Serials: 43,724  Visitors: 20,747,075  Members: 4,179  Photos: 21,202  Lat/Lng: 21,529  Masks: 3,151(51.38 %)  Traits: 465  Nudges: 108,035  Backglasses: 1,850
  Most Serials: Twilight Zone(922)  Most Submissions: Rod McLarge(2,953)  Most Points: Rod McLarge(25,240)  Highest Quality: EM-fan(9.21)  Most Nudges: King of Pinball(14,404)
Demolition Man - IPSND/IPDB No. 662 - February 1994
Backglass Image
Manufacturer: Williams Electronic Games, Inc., a subsidiary of WMS Inc.
Players: 4
MPU: Williams WPC (DCS)
Production Run: 7,019
Game Type: Solid State Electronic (SS)
Model: 50028
Submissions: 217 serials of 7,019 (3.09 %)
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.

614,691 (8,757.53 %) linear / 14,395(205.09 %) in 95 clusters 350 wide.
United States: 152 _serials Korea, Democratic People's Republic of: 1 _serials Denmark: 1 _serials Argentina: 1 _serials Italy: 2 _serials Canada: 2 _serials Belgium: 2 _serials Spain: 2 _serials Australia: 3 _serials Puerto Rico: 3 _serials Poland: 3 _serials United Kingdom: 3 _serials Germany: 5 _serials Sweden: 7 _serials Finland: 7 _serials Netherlands: 10 _serials New Zealand: 24 _serials United States: 152 _serials Korea, Democratic People's Republic of: 1 _serials Denmark: 1 _serials Argentina: 1 _serials Italy: 2 _serials Canada: 2 _serials Belgium: 2 _serials Spain: 2 _serials Australia: 3 _serials Puerto Rico: 3 _serials Poland: 3 _serials
Parts: 3 _serials Complete: 225 _serials Complete: 225 _serials Parts: 3 _serials Complete: 225 _serials
Other Parts: 38 _serials Complete Game: 190 _serials Complete Game: 190 _serials Other Parts: 38 _serials Complete Game: 190 _serials
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
Playfield Insert Labeling On the game in the flyer, the three round orange inserts near the car crash feature and also the larger white rectangular insert to the left of them are all unlabeled, no text or point values are shown on them. Some playfields will have all four inserts labeled, as shown in the image included here. At least one playfield has been seen with only the white insert labeled, and the three orange ones are unlabeled. If your playfield is an after-factory reproduction, select Replacement Playfield.(Valid Values: All four inserts labeled,All four inserts not labeled,White insert labeled only,Orange inserts labeled only,Replacement Playfield)
Jay St@fford2/25/201330

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
48930 50228385052 Display/Driver Fun House Korea, Democratic People's Republic of flag Korea, Democratic People's Republic of
50068 50228466151 Display/Driver Rod McLarge Sweden flag Sweden
51644 50228478711 Sound Board Rod McLarge United States flag United States
47008 50228478711 Sound Board Rod McLarge United States flag United States
28835 50228488081 MPU/CPU John Vorwerk United States flag United States
51224 50428428572 MPU/CPU Fun House Germany flag Germany
26099 50428432102 Solenoid Driver Antti Peltonen Finland flag Finland
26857 50428467611 Solenoid Driver Antti Peltonen Finland flag Finland
26708 50728543771 MPU/CPU Meester Pieter Germany flag Germany
13938 50728558821 Other/Unknown Leo Stelloo Netherlands flag Netherlands
49138 50728561231 Other/Unknown Dennis Braun United States flag United States
48982 51028386812 Display/Driver Dennis Braun United States flag United States
35641 51128436612 Solenoid Driver Antti Peltonen Finland flag Finland
32789 51328433372 Display/Driver Rod McLarge United States flag United States
27558 51328527361 MPU/CPU pinballservice-nl Netherlands flag Netherlands
31904 52028384862 MPU/CPU Pistol Pete United States flag United States
49552 52028557881 Display/Driver Fun House United States flag United States
34657 52028557911 MPU/CPU Rod McLarge United States flag United States
21889 52028561431 Other/Unknown Sergio Palma Spain flag Spain
31485 52228490231 MPU/CPU Pistol Pete United States flag United States
50157 52528569791 Display/Driver Rod McLarge Netherlands flag Netherlands
50099 52528569791 Display/Driver Fun House Netherlands flag Netherlands
33398 52828473351 Coin Door PATRICK Belgium flag Belgium
32884 53328377652 Flipper Board Rod McLarge United States flag United States
50422 53328418942 Coin Door Dennis Braun United States flag United States
30465 53328424062 Display/Driver Pistol Pete United States flag United States
35697 53328426902 Display/Driver Rod McLarge United States flag United States
31615 53328467111 Display/Driver Rod McLarge United States flag United States
10963 53328489831 Sound Board John Duchi United States flag United States
21217 53328492791 MPU/CPU John Vorwerk United States flag United States
28591 53328510791 Display/Driver John Vorwerk United States flag United States
48535 53328524081 Flipper Board Rod McLarge United States flag United States
21226 53328524081 Flipper Board John Vorwerk United States flag United States
30685 53328524251 Solenoid Driver John Vorwerk United States flag United States
47015 53328524831 MPU/CPU Rod McLarge United States flag United States
17389 53328576841 MPU/CPU John Vorwerk United States flag United States
49984 53328578121 Display/Driver Rod McLarge United States flag United States
32353 53328579841 Flipper Board Rod McLarge 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 50328435812, 50728465862, 51728465902 ^(5[0-9][0-9]28)(?<sortdata>[0-9][0-9][0-9][0-9][0-9][0-9])$ True
International Game 57128I562131, 53328I925082, 53328I580261 ^(5[0-9][0-9]28)(I)(?<sortdata>[0-9][0-9][0-9][0-9][0-9][0-9])$ True
Experimental Game 57128X562131, 53328X925082, 53328X580261 ^(5[0-9][0-9]28)(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... (click here if map does not show)

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