Williams AE-, AL- and AR- prefixes give the lug positions

From about 1985 Williams 23 AWG, 800 turn coils use a two-letter prefix that describes where the two solder lugs sit, looking at the round end with the lugs facing away: AE has them at both outer positions, AL at left and middle, AR at middle and right. The trailing -01, -02 and so on identifies the diode and sleeve fitted.

Systems

• Williams System 9
• Williams System 11
• Williams System 11A
• Williams System 11B
• Williams System 11C
• WPC Alpha-Numeric
• WPC Dot Matrix
• WPC Fliptronics
• WPC DCS
• WPC-Security (WPC-S)
• WPC-95

Related tips

• Firing a coil by grounding its ground lug
• Fit coil diodes with the band on the power lug
• Same winding, different length: Data East vs Williams A-22-550

Source: Master Cross Reference Chart of Coils for Coin Operated Games (last edited July 25, 2016)