Mk2. With Cruize Visor.

[Composite]

Indeed, a mutual friend has told me that a lot more than 5,000 were produced/issued.....the Navy and the Army had some......

Sadly I don’t know about what variants within Marks there were......

BUT it’s still a great piece and one I’d gladly have in my collection...

[SMP]

Here is a really good look at the worldwarcollectibles one :

https://www.ghw2.com/topic/27674-cru...comment-302790

[tinlid]

I noticed the ball joint on mine where the arm fits to the bracket, on the helmet, is slightly different to a lot of others.
Being a later date, less metal has been used.

[Composite]

There could well be intra-Mark, manufacturer-specific variants...there often is....

[SMP]

Here is an earlier one

Sorry, you do not have permission for that!

[tinlid]

That one being 1940 has two sides enclosing the ball joint.
There is a patent number just viable.