The Boston Polar Club pencil sharpener was an electric model that came with a glass cover which, purportedly, made it "dustless." The Boston sharpener made by the C. Howard Hunt Pen Company of Camden, New Jersey while the electric motor was a product of the A. C. Gilbert Company of New Haven, Connecticut. These were available ca.1936 so, as, far as pencil sharpeners go, the Boston Polar Club model is fairly modern.
Have one for sale? Please email me at Antikey.Chop@gmail.com