The ad above indicates that the Victors were 1-9/16” in diameter, i.e. 39.69mm. Interesting that Paulson et al. eventually moved down to 39mm, a hair narrower. (Or is what we call 39mm actually 1-9/16ths? I don’t have anything to measure that precisely.)
Also, I’m not sure what the ad means when it says “round edge.” The OP’s pics look like his chips are flat at the edge. Maybe I’m not understanding the terminology, or maybe they used that design again later with a different edge... I see from some of Seymour’s color photos pics of chips whose edges look more like coat buttons, so maybe those are the round edge type.