Bismarck Razor Works, Solingen-Germany.
The razor was made by August Müller. He was the owner of the Bismarck trademark.
The company was founded in 1892. In 1957 this brand was taken over the Fritz Bracht (DOVO) company.
The blade is 5/8, square point, full hollow ground.
The bone handle has a long crack, see last pic.
But I believe, it does not influence functionality of the razor.
The pictures speak for themselves.
The price includes delivery worldwide. PayPal Only, no eChecks, please.
Any questions: firstname.lastname@example.org