Stratocaste

I’m pretty sure that my guitar is original but that the serial number is not. After checking the instrument with black light I’ve found out that the whole guitar looks good but 1/2 of the back of the headstock. It has been refinished and the serial re-stamped for sure

Thanks everyone for your help! I have an update: the nut is 3,9 cm so it would put the guitar in between 1966 and 1969 considering the one piece neck and no volute. I checked the finish with a black light: it all looks good but 1/2 of the back of the headstock. It looks black (touched up). could it be that someone removed the “made in USA” diciture and changed the serial number to make look a guitar from the 70’s like one from the 60’s? Did you ever see a 335 from the 70’s with one piece neck and no volute?

Hello everybody, I recently purchased a vintage Gibson es-335 in a shop in Holland. It was part of a big trade with multiple instruments. The guitar looks and plays great! I started noticing some strange things and I was wondering if you could help me. The shop owner claims it's a 1967. From the serial it should be a 1966 or a 1969 because Gibson duplicated the serial numbers in those years. Of course the bridge has been replaced sometime ago. The guitar has still the holes of the old original tailpiece bridge. The pickups seems original (on one of them there is a pat number sticker). The finish is definitely old. What about the logo? It looks strange with the O super open and the S a bit sideways. I have found a pic of a 1969 that looks like that but without dot on the i. And also the serial number is odd. There is a oval circle around it... like it was stamped... strange. Did you ever see anything like that? Do you think the guitar is a legit 1966 or 1969 ES-335? Thanks for your help! Filippo