That is what is claimed about this particular model, but I've never been able to find any concrete documentation for this type of sgain dubh being used by the Highland Regiments of the British Army. Until I see documentation, I'm leary of the claim -- I am a Missourian, after all, so you've got to "show-me"!
I have a book with a picture of the original
when I get home from work tonight I'll try to photograph the page
and post it along with the information on the knife.
I think that this sgain dubh was a private purchase not regiment issue