I couldn't resist ! I swear that I tried...a little lol. Just bought these and can't wait to get them in as always. These pics are from the sale. They are Primus No. 51, Optimus No. 96, Primus 210, Optimus 00, and Optimus No. 45. I do not know the years since there were no pics of the bottoms. I guess that I have officially started my collection of brass stoves.