Engine Number

[Tatey]

Just been out again and the number i thought were just numbers appears to be 2 'letters' followed by 5 numbers, i think its MD for the letters but it really isnt that clear as they are quite warn away, im pretty sure its an M at the beginning, meaning its from 91. Hopefully it'll come up a bit clearer once i start cleaning up the engine.

Im guessing it would be wise to re-stamp the engine number onto the engine in a clear and easy to find place?