Bill,
I don't think that knife is as old as John Cheek thinks it is. Ron and Joe are better on the prewar pieces than me, but that's my 2 cents.
Tune,
John's knife has a stamp, which puts it post August 1939.I honestly don't know how it's possible to pin it down any closer than roughly 1940- 1942:

I agree with Joe about the timeframe of Bedink's knife:
War time for sure. Hard to say for sure exactly when, but I would guess late 1942 and possibly into early1943
Certainly not much older than that primarily because of the hilt which is not oval with a flat face.