I recently acquired this cartridge from a source outside the UK collecting community. Unfortunately it was inerted, as I do not live in a free country.
The headstamp is: dou. st 1 43
What is the significance of the dot after the dou marking?
How common are these? I would think they are probably not that rare, but I haven’t seen one before. This could possibly have ended up in the UK via a Luftwaffe Airman, or been brought back by a British Soldier.