Bill & Jack
I don't believe it's a Denmark special as the grind line on those are diagonal
I believe yours to be a mod 7-5 fisherman. The sheath would be correct too with the horizontal keeper.
It looks close to a 3-5 Hunter too, but if the sheath is correct to the knife, the keeper would be diagonal, as the keeper on the 3-5 changed late 50's early 60's I think with the brown button.
* I found a pic of the back of the sheath, it's a 7-4 fisherman
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It may be your photo Bill, but the grind forward of the stamp looks altered.
As to the stamp, it appears to be a type 1 as Jack says. I thought the small knives have a small stamp?
Thanks, Sam