Hi everyone, I've recently acquired a pair of vintage Church's, and I'm trying to figure out some things about them. They're two eyelet plain toe derbys, but my google-fu is failing me hard when it comes to more information. If the picture isn't clear enough, the inside reads: Line 1: 9. F. 73 Line 2: G010312 Line 3: 4900S (or is that a 5?) S8347 (again, the S may actually be 5) Based on my searching and the writing inside of the shoes, it looks like they're UK size 9F (so a US 10 D, correct?) on the 73 last. Can anyone help with the other numbers? Or is their a resource out there somewhere that records what the numbers mean? And did Church's ever make shoes with the Neolite Goodyear heel? Or have the heels been replaced? I know that the vast majority that I've seen have had the split leather/rubber heel, but was that the only way they were made? I would appreciate any help at all, thanks!