Underside is mirror with thick black collet. Item has weight on interior to serve as a paperweight with front text "This Paperweight Is One Of Our Many Advertising Specialties" with text going on to list products such as celluloid buttons, cardboard badges, etc. Text gives name and address of "Boston Office" manager with tag line "We Have An Article For Your Business." Exc. and displays Mint. First we've seen and rare.