I purchased a nice 6/8 Bismarck Registered #300 Bismarck Razor Works blade yesterday from an antiques dealer/former collector. A few strokes on a pasted paddle and stropping and it shaved very nicely. Not totally dialed in but I was pleased with my $30 price point on the razor. The original box has handwritten in ink Feb 15, '32 so I expect that is when it was acquired by it's original owner.