The remark to the picture of this headstamp indicate that case was made by Union Metallic Cartridge & Co., de Bridgeport (Connecticut). The same headstamp we can find on the case of the Russian Berdan cartridges.
So, I have some questions:
- Is it really headstamp of UMCCo?
- When (and how long) UMCCo use such headstamp?
- What another USA companies produced Berdan Cartridges (or their components) for Russian Government?