Machine Gun Corps variants.

[High Wood]

Apologies for starting yet another Machine Gun Corps thread but sorting through my small collection I have noticed some minor differences in the pattern.

They may be maker's variations or they may be reproductions.

Firstly, many badges illustrated on the forum have rivets along the bottom of the breech block. (I am not particularly happy with the second example).

[High Wood]

The second example, of which I have two examples have no, or poorly defined rivets. Are these a maker's variation or something else?