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