Greetings Gentlemen, I just purchased a very nice razor. It was made in Germany with the words "John Fernsler," "Dependable" and "Philadelphia, PA" on it. The scales are made of tortoise shell. Would anyone out there have any idea as to when the razor was made, or, when tortoise shell was mainly used as a material for scales, or, when it was no longer (approx.) used? I'm just attempting to get a general idea as to its date of manufacture. Thanks.