I think I may have triggered a new obcession today ordering the Gem junior 1912. If I'm interested in acquiring old razors, probably pre WW2, what are the popular ones I should be looking for? DE and SE, doesn't matter yet, I think I'll be interested in collecting both. Gem, star, ever ready, gillette. I have no idea on models of any, so just looking for names and suggestions. Is there a must have list for collectors?