I'll go find the one on my early 80's Sport DLX for you in a few when I take it for a ride. I'll edit this post when I get all the info collected for you.

EDIT:

As promised data on my Centurion Sport DLX

Year: early 80's guestimate from parts and ebay auction
Model: Sport DLX
Serial: Y6F3481
Tubing: Tange Infinity main-triangle. HiTen fork and stays.
Seat tube diameter: 26.6
Derailleurs (F/R): Suntour AR / ARII with friction stem shifters
Brakes: Dia-Compe N500 with Diacompe levers
Wheels: Alloy rims, sealed hubs, 6-speed freehwheel.

Anything else?