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: 50,759  Visitors: 29,757,520  Members: 3,821  Photos: 27,663  Lat/Lng: 25,017  Masks: 50,759(816.45 %)  Traits: 503  Nudges: 140,711  Backglasses: 1,862
  Most Serials: Twilight Zone(1,060)  Most Submissions: Dennis Braun(3,523)  Most Points: Rod McLarge(27,988)  Highest Quality: Jim Butler(9.15)  Most Nudges: King of Pinball(18,870)
Creature from the Black Lagoon - IPSND/IPDB No. 588 - December 1992
Backglass Image
Manufacturer: Midway Mfg. Co., a subsidiary of WMS Industries, Inc.
Players: 4
MPU: Williams WPC (Fliptronics 2)
Production Run: 7,841
Game Type: Solid State Electronic (SS)
Model: 20018
Submissions: 304 serials of 7,841 (3.88 %)
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.

979,910 (12,497.26 %) linear / 25,439(324.44 %) in 87 clusters 392 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
Playfield color There are two variations of pink color on the factory-original playfields. One is regular pink and the other a hot pink version. Fun House10/7/201623

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
59616 20018I115026 Display/Driver Dennis Braun United States flag United States
26843 20018I115062 Solenoid Driver Antti Peltonen Finland flag Finland
59787 20218003151 Flipper Board Dennis Braun United States flag United States
61235 20218009791 Flipper Board Fun House Italy flag Italy
59688 20218009841 Solenoid Driver Dennis Braun United States flag United States
42232 20218036711 Display/Driver John Vorwerk United States flag United States
49623 20218835480 Display/Driver Fun House Korea, Democratic People's Republic of flag Korea, Democratic People's Republic of
36394 20218848280 Other/Unknown Felix United States flag United States
43720 20218917400 MPU/CPU Rod McLarge United States flag United States
48940 20218935350 Sound Board Fun House Korea, Democratic People's Republic of flag Korea, Democratic People's Republic of
49626 20218947880 MPU/CPU Fun House Korea, Democratic People's Republic of flag Korea, Democratic People's Republic of
56578 20218962510 Coin Door Dennis Braun United States flag United States
42915 20418967770 Display/Driver John Vorwerk United States flag United States
50164 20718027741 Solenoid Driver Rod McLarge Netherlands flag Netherlands
56756 20718855510 Sound Board Fun House United States flag United States
50985 21018003082 MPU/CPU Dennis Braun United States flag United States
43223 21018017382 Flipper Board Rod McLarge United States flag United States
58301 21018024671 Display/Driver Fun House United States flag United States
43479 21018033282 Solenoid Driver Antti Peltonen Finland flag Finland
56747 21018033422 Display/Driver Fun House Netherlands flag Netherlands
48931 21018833200 Flipper Board Fun House Korea, Democratic People's Republic of flag Korea, Democratic People's Republic of
49632 21018842000 Flipper Board Fun House Korea, Democratic People's Republic of flag Korea, Democratic People's Republic of
57221 21018853790 Display/Driver Fun House United States flag United States
35838 21018924930 Sound Board Felix United States flag United States
26842 21118978720 Solenoid Driver Antti Peltonen Finland flag Finland
44881 21418002942 Flipper Board Aldo Scassano Italy flag Italy
56565 21718033981 Coin Door Dennis Braun United States flag United States
48423 22018005392 Display/Driver Rod McLarge Netherlands flag Netherlands
33031 22018830350 Power Supply Rod McLarge United States flag United States
42426 22118923440 Solenoid Driver Antti Peltonen Finland flag Finland
49398 22118930580 Display/Driver Fun House Korea, Democratic People's Republic of flag Korea, Democratic People's Republic of
48919 22218905800 Display/Driver Fun House United States flag United States
59561 22518848220 MPU/CPU Fun House Italy flag Italy
57050 22518970070 Display/Driver Fun House United States flag United States
18792 22718000091 Sound Board John Vorwerk United States flag United States
57295 22718038581 Coin Door Dennis Braun United States flag United States
56158 22718907970 Display/Driver Dennis Braun United States flag United States
58883 22718910300 Solenoid Driver Dennis Braun United States flag United States
62204 22718921470 Display/Driver Fun House United States flag United States
8603 22718942530 Other/Unknown Bill Ung United States flag United States
61521 22718955250 MPU/CPU Dennis Braun United States flag United States
52491 22718978320 MPU/CPU Dennis Braun United States flag United States
33364 22918921850 Flipper Board Rod McLarge United States flag United States
48833 22918941400 Coin Door Rod McLarge United States flag United States
33064 22918942870 Display/Driver Pat Herbert 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 6/29/2007 12:22:32 PM by Jess Askey
On Bally games from this era, there are serial number stickers everywhere. There should be one on the front of the cabinet under the coin door, one on the back of the cabinet on the model sticker and I believe there is one on the top of the backbox as well (this is a good one to look at if the others are damaged). Also, all the game printed circuit boards have the original serial number on them as well.
Posted 11/30/2008 10:30:39 AM by Steve fisher
also look on the power pack
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 22718014962, 20018110067, 20018110074 ^(2[0-9][0-9]18)(?<sortdata>[0-9][0-9][0-9][0-9][0-9][0-9])$ True
International Game 22918I942850, 22918I940590, 22918I940360 ^(2[0-9][0-9]18)(I)(?<sortdata>[0-9][0-9][0-9][0-9][0-9][0-9])$ True
Experimental Game 22918X942850, 22918X940590, 22918X940360 ^(2[0-9][0-9]18)(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...


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