Around 1968, Peter Max designed a series of electric clocks for General Electric. Designs were much in the style of this 3" dia. button which was likely worn by department store clerks to promote the clock sales. Reverse has cardboard back colored light green and about 40% of this green color is gone so the cardboard is simply white in those areas. The celluloid itself is N. Mint and displays Mint. Button is rarer than the clocks.