Quote Originally Posted by 45flint View Post
If this is true batch number must be on various parts? Never had mine apart, is this true? If so how many parts have the number?
According to Gordon Bruce’s book, post-war Seniors had the batch number on the frame (under the left grip) and on the spring guide. Premiers had it on the frame in the same way and on the “flange at the front of the air cylinder”. For post-war Mark 1s, he says they were batch numbered on the frame, trigger guard, barrel catch and the “spring guide flange in front of the air cylinder”.