I recently inherited an Arisaka Type 38. Past that, that is all I know. It never had the mum, which I found odd. It is very old, from what I can tell. The serial is worn, but I think it's 6386. The Arsenal mark is something I've not been able to find either. It looks like a box missing the right wall with either a circle or a half-moon with the horns facing up. Everything appears to match, but it's seen better days. Anybody got any ideas?