Coil frame sizes by maker

Gottlieb and Bally generally used a 1 1/2 inch coil frame with a 1 5/8 inch sleeve; Williams used a 1 5/8 inch frame with a 1 3/4 inch sleeve. Williams coils therefore don't fit Gottlieb or Bally mechanisms well, and vice versa.

Systems

• Electro-mechanical

Related tips

• Coil stops by maker
• EM coil voltage by maker
• Rewinding an unobtainable coil onto its old frame
• Wico coil numbers start with the original maker code
• Coil sleeves and plungers to keep
• Relay coil resistance and frame sizes
• Typical EM coil resistances
• What makes a coil stronger or weaker

Source: Repairing Electro-Mechanical (EM) Coin Operated Games to 1978, Part Two, Clay Harrell (pinrepair.com)