original c. 1930's art deco style polychrome enameled double-sided exterior die cut steel advertising sign, introducing (beginning in 1931) verichrome kodak film. the hard to find hanging trade sign retains the original fanciful wrought iron mounting bracket. wratten & wainwright verichrome was introduced around 1907/8 offering greater spectral sensitivity and speed compared to contemporary emulsions of the time. the company was bought by kodak in 1912. in 1931 kodak released the film on a safety base as a roll film, with greater latitude and finer grain than the kodak nc (non-curling) film that had been the standard since 1903. kodak verichrome safety film was eventually replaced by kodak verichrome pan film in 1956.