Cotapin Posted April 27, 2019 Report Share Posted April 27, 2019 Hi I would be grateful if anyone could give me information on the year of my bike. The engine and frame number is 51M12908. I would also like to know if this is a Malcolm Rathwell model although it tank/seat unit doesn't show this. many thanks in advsnce. Quote Link to comment Share on other sites More sharing options...
nh014 Posted April 28, 2019 Report Share Posted April 28, 2019 Serial number 12908 is a 1978 model. Malcolm Rathmell signature tanks were on early production Cota's (1976 and early 1977), then there was a short period of plain tanks, and then they went to the black and gold decal on the base of the tank at serial number 11307 for the 1978 model's. Remember that Montesa, as well as Bultaco and Ossa made "running" changes which made identifying models by year a little fuzzy at times. 1 Quote Link to comment Share on other sites More sharing options...
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