My understanding is the transition to the hot-blue du-lite technique took place over a number of years, but was basically complete by the time "postwar" guns appear.

Frankly, I find a bit of flaking on a prewar somewhat reassuring - though I suppose even that can be faked. 21 frames flaked, too - not just 21 floorplates.

I can't remember seeing an original postwar Winchester that flaked. Anyone?

Sam