I got a picture of both Hapurs 1940s hr ring and Evgeniys 1930s hr rings side by side.
harpurs on the left
evgeniys on the right.
harpurs is a taller band with a deeper die stamp cut. but evgeniys skull
Is perfect. not sure which band is the proper height. maybe someone can let me know the dimensions and I can measure both.
you choose which one you like.

20180329_033200-1209x907.jpg (83.17 KB, 360 downloads)