i just relised how original my 1200 sedan is. While stripping it for body prep i found the service manual for it. It was del to the owner on 5/2/72 he serviced it every set amount of K's right up till 1980 by this stage it had only travelled 18,000 miles. So the reading of 85,000 miles on the dash would no doubt be correct. When i bought it last year it had the original radio (which also came with instrutions in the owners manual) in it. Just thought id share this info with anyone who cares.