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- Nov 6, 2013
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I've had a 66-2 for years but I still don't understand all the numbers on the yoke. The Mod number is easy but I'm not sure of my serial number. There is an alphanumeric on the yolk AUV#### that I "think" is the serial number but there is also on the lower part of yolk when opened there's another set of numbers i.e. a B25 and a five digit number below that. What are all these numbers?