Went to sheldon's and as far as I can tell, 70s Centurions are hard to date without components on them. I just picked up this frame at a swap for $10! I have a 70s Super LeMans, and just sold a 76 Pro Tour, and now fixing up this one. Rear end is chromed like the others, but the ID stamp is on the seat tube near the BB. Serial # 6H3709. Was Silver, going to be light metallic blue, or maybe I get crazy and go hot rod purple? Anyways, looking forward to getting it sprayed out soon! Any thoughts are appreciated, cheers!