M35 DD SE 64 Heer Overpaint - with some history

[sysyphus]

DRP wasn't printed on some of those early dated 1931, like this one. maybe the patent wasn't even done yet.
I have seen some examples without date and DRP (as yours).
I have one example without DRP yet stamped 1931.
And of course DRP and 1931 together.

lovely helmet Michael. i like the early days

[MAP]

DRP wasn't printed on some of those early dated 1931, like this one. maybe the patent wasn't even done yet.
I have seen some examples without date and DRP (as yours).
I have one example without DRP yet stamped 1931.
And of course DRP and 1931 together.

lovely helmet Michael. i like the early days

Thanks for stopping by here and adding your knowledge Andrea. Your input over at GHW was equally helpful.

I would agree. It makes sense that these were just prior to the patent and possibly the official adoption as the M31. The different combinations of observed stamping certainly makes it fun to research.