Games built on System 3

System 3 (six-digit displays): Hot Tip (11/77, #477), Lucky Seven (3/78, #480), World Cup (5/78, #481, the first with electronic sound), Contact (5/78, #482, wide body) and Disco Fever (8/78, #483).

Systems

• Williams System 3

Games

• Contact
• Disco Fever
• Lucky Seven
• World Cup

Related tips

• System 3 fuse chart
• Sound EPROM files used by System 3-6 games
• World Cup will not boot on standard white flipper ROMs

Source: Repairing Williams System 3 to System 7 Pinball 1977 to 1984, Part One, Clay Harrell (pinrepair.com)