I'll really new to Rickenbackers but came across what the seller described to be a 1976 4001 that I'm thinking about going to check out. I'm not really sure what to look for to authenticate that it's not a copy. Other than the serial number on the input jack and checking under the truss rod cover for 2 truss rods, I'm kind of clueless. I attached a couple pics that the seller sent me. I know not the best but I'd like to know what to look for if I go check it out. Looks like a refinish to me as all the Rics I've seen have a white binding around the body and have never seen what looks like a sparkle finish on the headstock.