I live in Hong Kong and last week I went and checked out an old Canadian defensive position. I found quite a few .303's and even a Grenade Launching Cartridge. Anyhow, I also found a small buckle looking thing. It was in pretty good condition so when I first saw it I thought a hiker had dropped it recently, but just before I launched it into the Stratosphere I noticed an engraving:
So it is most likely off some sort of a Smith and Wesson holster or ammo pouch. But I have been searching everywhere and I can't find anything similar.
The jagged edge is quite distinctive, but nothing I've seen matches.
it is about 2cm square.