All About Pocket Knives

I am not saying this is a counterfeit as such, but it is quite unusual. The frame and handles are from the late Schrade Cut.Co. period, 1937 up until the end, December 1946, but also extending briefly into the Schrade Walden period, perhaps 5 years, perhaps less. An original knife with this frame/handle combination would normally have a sabre-ground master and sometimes a secondary like the knife in this ebay listing. It would never have the secondary only, as shown here. The handles would have been the "fibestos" shown here; and with either 5 or 6 pins; all is good here. Lanyard hole or not; all good there. Now here is another anomaly: The tang stamps. This secondary blade is from the mid to late 1950s period, and on even to 1973, with that tang stamp, and with an inexplicable pattern number on the pile side. It appears that the numbers were individually stamped, and (possibly?) from different stamp font set. Very strange. This frankenknife may be original out of the shops back in the 1950s, or an end-of-days knife, or a lunchboxer, or a COUNTERFEIT. Quien Sabe? Not my knife, and I am not going to bid on it, but very interesting. I can't imagine anyone counterfeiting one of these, so it is probably legitimate on some level, (no malice aforethought?).
https://www.ebay.com/itm/Vintage-Schrad ... 1438.l2649

Although there are 2 dings on the mark side bolster the pivot pin looks undisturbed. To me this suggests knife is all original and therefore a 'lunch box' origin is a good possibility.
kj