Originally Posted by
Andy_K
Thanks! That's great information. I can't make out any digits on the bottom bracket with the paint intact there. I did, however, find a serial number on the steerer.
Would you say that's the 51st frame of 1971 with a builder mark of 5 or is it the 551st frame of 1971 with the builder mark somewhere else?
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I think 551st of 1971, but I have never looked at my Mercian's steerer to be honest. On bottom brackets the builder number is usually stamped on another line. I'll try to remember to look closer at my son's, as it is a contemporary of yours.