Year: 1980 

Calculator watches grew in popularity once Casio dropped its number-crunching wristband. Billed as “the watch that replaces everything,” the C-80 freed us from computing numbers on the stylus-centric smart watches of the era, donning larger buttons to accommodate easier calculating. Oh yea, its fashionable presence also resonated with every nerd, playboy, sports jock, and teacher in your high school.