I had assumed that both these cartridges were the 11mm x 52mm Dutch Beaumont until I happened to compare the two side by side and noticed the obvious differences in shoulder position & height. I would have thought the difference so great that these cartridges wouldn’t both chamber in the same weapon. There is also a noticeable difference in bullet profile.
I suspect that one of them is the Dutch Beaumont but what is the other?
And I’m no longer even sure which of them is the Dutch Beaumont…if either!