Oh now you guys are going to make dig out my old #2's to look them over!
Actually I have seen 2 stamped springs, each with slightly different wording. Both were on 1.5 ribbed jaw LS. Digger Dale may have better information than I do.
The stamped Victor springs did not come on any traps. They were sold as replacement springs, so they could be on any trap that the buyer put them on. #1 1/2 and #2 Victors have the same size spring, this is the only size that I have seen with the stamp. The stamping on springs was only done for a very short time.