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: 6,709  Serials: 74,289  Visitors: 93,199,373  Members: 6,019  Photos: 49,575  Lat/Lng: 42,556  Masks: 74,289(1,107.30%)  Traits: 586  Nudges: 251,239  Backglasses: 1,865
  Most Serials: Twilight Zone(1,415)  Most Submissions: Dennis Braun(6,233)  Most Points: Dennis Braun(46,427)  Highest Quality: The Knight(17.00)  Most Nudges: pinballservice-nl(31,484)
Williams System 6A
IPDB:  View at IPDB (External site)
Stats:  MPU used in 2 games.
   
BackglassGameYearManufacturerSerials
Backglass Image Algar1980Williams Electronics, Inc. (1967-1985) 21
Backglass Image Alien Poker1980Williams Electronics, Inc. (1967-1985) 93