I just picked up a stash of 8 DE razors. I think I pinpointed what models they are, but I am having trouble figuring out what year they were made. This can be found utilizing the code on the bottom of the razors, correct? Anyway, I am assuming there are a few of you out there that have done this once or twice. Any help is greatly appreciated.
The first is a Gillette Slim Adjustable with J-1 on the bottom. The second is a Gillette Tech with C-4 on the bottom. The third is an all metal Gillette Super Speed with D-2 on the bottom. It is the only one with the box. The fourth is a metal and black plastic Gillette Super Speed with R-2 on the bottom. The final two are both Gillette 3 pieces. One is silver and the other is copper in color. Neither of them have letter or number inscriptions.
Also, I am new to DE shaving. Which should I try out first tomorrow morning?
Thank you for you help!