Ron -

wouldn't it stand to reason that the sheath throat width is not "concrete" for the most part because of the "bin" issue. Not too may Hunter's during the war so I wouldn't think it would be that unusual to have a wide throat in a post war "3 1/2" or even 3 or 4 when they showed up shortly thereafter.

In fact, as you well know, the blade grind for the most part was of the "3 1/2" variety for a bit after the war. Maybe only a matter of months.

I think you meant your dad's knife was from the first half of 1946?

Tune's knife does appear to have a narrower throat.