Realistic's Mach One speakers were one of the iconic speakers in the late 70's thru early 80's.  For whatever reason Realistic never made a speaker badge for them nor did the put a spec plate on the back of the speakers.   These spec plates are made of .02" sublimated satin silver aluminum and come with double-sided tape on the back for easy attachment to any surface.  They measure approximately 6" x 3" as shown and are designed to fit on the face of the speaker motor board.   

The price is for one pair (two) identical badges.