Vintage Straight Razor Info

Hello everyone, I am new to straight razors and wet shaving, and thought I would ask your advice. I just purchased a vintage F.A. Koch & Co. "Faultless No.20" from a seller on Etsy. The blade looks to be in great condition with no rust, stains, or damage that I can see, and the vendor states that it is extremely sharp. The scales are black plastic or bakelite, and one side has a small crack near at the pin. I plan to restore this razor to shave ready and use it, and I will replace the scales. I paid just under $20 for it, which included shipping, and the seller is throwing in a vintage box (doesn't match the razor, but is in good shape.) Did I do okay for a newbie purchase? My real question is this, though: how old is this razor? I'm just curious about its history and age, not because of its monetary value, but because of the good feelings that will come from restoring and using a small piece of history. Can anyone tell me anything about when this particular razor might have been made? I read somewhere that F.A. Koch was around until 1900, but I don't know how accurate that article was. Anyway, thanks so much for your help, fellas!