Boston - Pencil sharpener Industrial design - Boston KS

The object in the image is a vintage pencil sharpener, specifically a Boston KS model.
The Boston KS model was introduced in 1921 by the Boston Specialty Corp in the United States. The company was subsequently acquired by Howard Hunt in 1925, who continued the production of these models. In 1957, X-Acto purchased the company, which later came under the ownership of Elmer's Glue.
It is a planetary cylindrical pencil sharpener, which uses two conical helical cutters operated by a crank handle. The model features a mechanism with holes of various sizes to accommodate different pencil diameters.
These pencil sharpeners were very common in schools and are known for their exceptional durability and robustness. They often require little maintenance and, with proper care, can last for generations. Vintage models are still restored and used today.
Photos are an integral part of the description. Tested and working.
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