Antique 1906-07 US Pencil Sharpener Automatic Hand Crank Works | eBay
U.S. Automatic Pencil Sharpener by APSCO, c. 1911 - Made-in-Chicago Museum
Liskeard Museum on X: "The cylindrical or 'planetary' pencil sharpener was first developed in Chicago in 1896, offering an alternative to the traditional 'prism' models that were prone to breaking pencil leads. [
Why are Electric Pencil Sharpeners Made in the '80s Better than New Ones? - Core77