I recently got a Les Paul Professional, a model I've been looking for for years. I'm trying to nail down whether it's a '69 or a '70. I know it doesn't matter as it would be the same either way but I would like to find out as a matter of curiosity. I'm hoping someone here, (maybe moonweasel), may have some insight. It has a three piece neck, an 843xxx serial no., A small "proto-volute", no "made in USA" and a dotted "I". The pots are dated the 44th week of '69. I'm including a picture of the front of the headstock. My understanding is that the 8xxxxx serial numbers were used in '69 but not again until '73 and that this model was only made from '69 to '71 as they were replaced by the recording in '72. Any info would be appreciated.