If you don't mind me asking, is the #12 the most rare of the 3?

There is no such thing as a dumb question if you don't know the answer. "Oneida Jump" is a brand and "Victor" is a brand. Oneida Community started making "Newhouse" traps in the 1850's, later they added the "Hawley & Norton" and "Victor" trap brands to compete with lower priced traps made by other companies. The first Victor traps were made in 1886, and were called "The Victor" then later just "Victor". The name "Oneida Jump" started around 1910 and before that the larger sizes #2,12,3,13,4 and 14 were all double under spring traps. The smaller size #0,1 and 1 1/2 were single under spring, all of them had a circle stamp on the pan that read "Oneida Community, Ltd." and no brand name. They were originally called "Star" traps for the first few years they were produced. Oneida Community made a lot of different brands of traps until Feb. 1925 when they sold out their trap business to Animal Trap Comp. of America. A.T.C. continued to make some of the brands and discontinued the others. Oneida Community started cutting the "V" in the pan of Victor traps in 1909 as a trade mark and in 1914 started cutting the "V" in Oneida Jump pans as well, even though Oneida Jump traps are not Victors.