I was looking at getting a Darwin Deluxe and saw this for sale. In most photos I could find in the internet, the top of the razor plate had the Darwin logo on one side and a serial number on the other. In the pictured razor, the top of the plate has the Darwin logo on both sides and no serial number. Was there a change at some point in this razor where serial numbers stopped being used or is this not a Deluxe? I don’t know much about the history of these and figured if anyone would know it would be from here.