Crank I.D

Does it have a part number on the back - usually starts wih FC-

Looks like a polished xtr m900 or lx of the same era to me. Crank caps look a bit cook bros.
 
Thank you ishaw, I plan on trying to clean these tonight, I've also just been told there should be an I.d number on the back of these arms over in readers 1997 section , so I'll be able to check later and hopefully confirm what make and model they are.
 
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