This is a rare (really…), historically significant box camera. If you have a post 1900 box camera, it owes it design to this camera!
From the Boston Camera Manufacturing Co. this was the first camera to use flange-spooled and numbered paper-backed roll film and a red window (it was reverse “D” shaped) to view the exposure number. This design dominated amateur box cameras for 70 years. The patented design was so threatening to Kodak that they immediately sued to stop production, but the suit was dismissed. Rapidly Kodak duplicated the design in their nearly exact copy, the Bullet camera, ignoring the patents. Boston sued for patent infringement and Kodak started paying royalties. I imagine that George Eastman was irked to no end that someone else had patented a really great, revolutionary design and HE had to pay royalties. Soon Kodak bought Boston to avoid the royalties.