HKP64 Litter Mate

[IllinoisCornFarmer90]

My very first TR helmet was a Luftwaffe M40 HKP64 Lot #12230.

It just so happens to be that I found another one for sale exactly like it!
Pretty cool in my opinion, but how common is it to find a true litter mate? The first five pictures are of my helmet that I currently own, a HKP64 12230.

The last 5 pictures are of the M40 that is the litter mate.

Any insight or information would be awesome

[helmet2id]

I think it is really neat to have twins like this! Jim G.