BCN gramophone needle sharpener.
Remington electric shaver/safety razor blade sharpener
Rockit blade sharpener, 1909
1909
IM "Pointmaster" fibre needle sharpener.
Davey Rollright Thorn needle sharpener
"Gem" knife sharpener, c.1928
Razor blade sharpener
"The Spiro" Safety Blade Sharpener - From Microbiology Lab
Knife cleaner and sharpener, by Spong, c.1900
1900
Circular saw sharpening machine
Drill sharpening machine
1950