Hey everyone. First time going around to a few antique stores today and picked up a nice Gillette Tuckaway in very nice condition along with a Kraut Dohnal straight razor (I think). I must say that I'm definitely addicted. Quick question tho, the Gillette doesn't have a serial number, just a patent date of January 1920. Does that mean that it was made in the 20's or that was when the patent was filed for?