Here's the Krupp symbol.
No one is disputing that they used a series of interlocking rings.
What also is NOT in dispute is that the rifle pictured is a Japanese Arisaka.
Krupp NEVER made Arisaka rifles.
NEVER.
This is the symbol of the Tokyo/Kokura Arsenal, which was also a series of interlocking rings:
If you look closely at the picture of the action provided by Samurai, you will see that this picture matches what is stamped on the side of his gun.
I'm not sure what the issue is here -- that no one other than Krupp could have used interlocking rings?
Just for grins and giggles, whose symbol is this?
That's the Ballentine Beer symbol. Brewed in America. And not by Krupp, which never had a brewing division, either.