Last night my fellow bandmate brought his Dad's vintage Fender Precision to our gig. I'm trying to pinpoint the year which is a little difficult as the serial number has been sanded off of the headstock (I think his Dad bought it from a pawnshop; probably stolen). I've narrowed it down to a late 70s model as it has the thumbrest on the E-string(1974) side as well as the original serial number being on the headstock(1976). It has both the bridge and pickup covers, a four or five ply black pickguard, and black plastic control knobs. I'm not sure if the knobs are stock. Also, I do believe this Precision has the "A" neck as the neck width at the nut looks very narrow like a Jazz Bass. It does have the typical "baseball bat" feel though due to the thick profile. Any ideas on what exact year this bass is and how much it would be worth? It seems all original except for possibly the control knobs and the serial number is sanded off. Otherwise it's in great shape.