Hi, I was hoping someone could tell me something about it! I think the sheath is seal fur, it's incredibly thick leather , even for an al mar.
It's part of a large collection which I bought at an auction, it belonged to a former British Commando, some of the knives have his regiment badge attached to the sheath. I'm going to have to part with some of them but I'll let myself hold onto a few...
Thanks for the replies