Frank Allan really is into these & I'm sure will have lots to say about it. I had one of these once but let it go. Can't do everything I'd like. Now I restrict my collecting to what was produced & used by the Japanese in WW2. I even sold my Saimese marked Nagoya Triangle bayonet to Frank some time back. These are scarce & it looks like you have a nice one.
The inherent vice of capitalism is the unequal sharing of blessings; the inherent virtue of socialism is the equal sharing of miseries.