I just picked up a Centurion Super LeMans frame while dumpster diving. It is baby blue with chome lower portions of the fork and rear portions of the chain and seat stays. The serial number is on the seat tube toward the bottom and is N6225. The Suntour SL front derailleur is marked RG 4532. The RG would indicate a 7/75 date. The brake calipers are Weimann with date stamp of 8-74. The seat post is SR and has 7X.9 on it near the insertion minimum mark. The X is really either a 3 or a 5 but I can't be certain which. It is 26.0mm diameter as indicated on the post itself. Since the component dates are from different years it is hard to say but I am thinking model year 1976. Maybe the 6 in the serial number is a year place mark.

Craig