Either a war trophy obtained by a Pole serving in the German army in WWI, and there were many, or perhaps a rifle supplied to one of the Baltic States that either filtered out in the hands of an escaping Balt at the time of Soviet invasions of 1940, or was brought into Poland by a Red Army man in 1940. Could also have been in a German collection that the Poles took over after WWI, or perhaps was taken from a Red Army soldier in 1919-20 during the Polish war with the new Red Army. That last one might be the most likely.
Interesting! I bet that rifle has seen quite the mix of service.




















































