Historical information
Razor blades were expensive items early in the 20th century, and were usually sharpened rather than replaced when they became blunt. This Allegro Razor Blade Sharpener dates back to around 1927 in Switzerland.
Physical description
Metal, automatic razor blade sharpener with a sharpening stone, in a red leather case containing printed instructions.
Inscriptions & markings
"Allegro 1034419 PT Bte S.G.D.G.D.R.P. Brit Pat. 138265-278329"
