The listing, VINTAGE BAKELITE ADVERTISING AP MUFFLERS BOX CUTTER KNIFE has ended.
Vintage advertising box cutter knife, AP Long Lasting Muffler, red box cutter knife. The handle is some sort of red plastic and I've seen it listed as Bakelite on e-bay. Just not sure. This is a neat old knife. You lift the bar and slide the blade of the knife forward. It is engraved "AP Long Lasting MUFFLERS" with white paint in the engraving. Much of the white paint is missing and the knife needs a good clean up.