Where does this information come from? Has anyone asked Jim Allen about this number? I'm not up on Masis this late, and that number doesn't seem to be related to all of the numbering systems of the past. Was there some change? When did it happen and do the numbers relate to something like a date or sequence? I thought the later San Marcos frames were "SMC" and some size or serial numbers. That number seems more like a post 1975 Italian type of serial number to me.
I haven't been able to see any photos of the bike, which would obviously tell me quite a lot.
Brian Baylis La Mesa, CA
Please note: message attached