actually the number you posted for the controller is a part number not a series number
being a PMC controller that narrows it down slightly but there should be a series number on it as well like a 1266 or 1243 and if it says SEPEX on it or not?
can you look again and see whats on the sticker on it
describe its dimensions or what it looks like?
you can try turning on the key , watching the display and see if it shows you any info during startup. It may flash the series of the controller across the display during startup before the hour meter display comes up.
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