Just purchased Montesa Cota 200 with engine/frame number 29M02572. I'd appreciate any help in finding out year of manufacture and what the actual numbers/letter(s) mean. Many thanks in advance. 

The first 200's came out in 81 the later 200 'c' model came out in 82. You can tell if you have a later bike as it had loops welded on to the frame to protect the engine cases and the tank seat unit was sighlt different over the top shock mount plus it had the later front hubs and mk2 amal..

Hope that helps..