Hey gashepherd, I just picked up a very, very similar super le mans but slightly larger 23" frame. I dated my components as ranging from 1972-75. Front Cyclone derailleur date code of OF, rear Cyclone GT derailleur date code PF, Diacompe center pull brakes dated 0375, fork stamped Tange 5E and seat post marked 75.9 (took me 3 days to free it) Frame SN is TE29459. If the E represents a '5', we'd have 1975 frames. I'm guessing (pending T-Mar confirmation) I've got a late 1975-early 76 Super Le Mans. And yours will probably be very close in age based on similar SN. Main difference I see is that mine has downtube shifters vs your bar-ends. I hope this helps and adds to the T-Mar's database.
SR seat post date code?

Frame SN