Need validation on RG550 authenticity
Pretty sure it's an RG550. I think some of the things in question were modifications by the original owner.
First, the serial number is on a silver sticker and not printed on the wood. It looks original though. Serial number is F75XXXX, which, if I understand correctly, is a 1997 model. The neck is clear coated, but it wraps around the serial number. In other words, it looks like they masked off the serial number.
Also, what type of truss rod adjustment did it use? This has more of a nut then the usual allan wrench style.