WardenWolf
member
Thanks for posting, and sorry for the delay in getting back to you. As I thought, those aren't factory symbols. They're just generic marks that most of these guns have. The three concentric circles, without any additional mark, signify this is a Kokura Armory rifle. This confirms my previous assessment that it is a Series 23 rifle. It's an early-war example of the original Arisaka 99 design, before it was altered and simplified to speed manufacturing and reduce resource usage. Starting around 1943 or so, they began leaving off things like the antiaircraft sight wings and gradually expanding that to the monopod, dust cover, and other aspects until you are left with the infamous Last Ditch guns. This is an unaltered example of the design, and one of the last made before they started dropping features.