That's a good one. I thought the sliding latch and that label inside put the box earlier than 1912, hard to say . I knew it was a black covered box .I don't know if there is a definitive cutoff date for the wood box with the slide latch, maybe someone more knowledgeable can chime in and share. It is interesting how the fastening types changed. There are some with the Darwin type snap, even a metal box that has a Darwin style snap. I just bought one for $25 off ebay just because it was so different, I'll probably put the 1905 single ring I just received in it after I clean it up. I suspect the metal box with the Darwin snap is circa 1920, maybe a little older. I need to find a patent date for those unique Darwin style snaps. They call them "Poppers" in England, that is how I found a box of them for sale on Ebay and bought them to fix my Darwin snap some day .Hey Firedan, I looked back at my original photo and agree with you it initially did look like a G! However I have double checked the serial and it's 100% a C just a bad photo with a lot of surface scratches. The box was actually stripped down to the wood but it originally would of been covered over in a black kind of leather cover all over. It's still on the base of the box.