All of these have been previously posted in the "Old Knives" thread, so stop me if I'm repeating myself.
There have been several nice Robeson jacks posted in this thread already, so I'll not duplicate any of those.
All these pre-date WWII, except the 522482 stag trapper.
A wood handled 027 EO jack:
A stag handled 522482 trapper:
A large 622037 cigar jack:
A 4" 622062 regular jack, etched "
OUR LEADER":
622284 swell-center:
An interesting curved jack with nice pattern shape, 622357:
A bone handled half trapper, 622482:
A hefty handfull that really fits the hand well, 622426:
A nice two blade "CAMPERS" knife, 622608:
A 4" sleeveboard with pinched bolsters, 622690:
My favorite knife. A 622787 sabre-cut spear etched,"INDIANAPOLIS PAINT AND COLOR":
A slim half-trapper with sabre-cut clip, 622721:
A nice slant bolstered equal-end with interesting clip master, 622847:
A heavy 622056:
An older no frills knife, 622765:
A thin pearl handled Baby Barlow, 722236: