mantel clocks, which were made of marble, black-painted metal, or
black enameled wood were popular from about 1880 to 1920. Adamantine,
which is a patented, colored celluloid veneer, was used on clock cases
to imitate onyx, marble, wood grain, and other finishes. Celluloid
is a trade name for the first artificial plastic, invented in 1869.
Some clock cases in the early 1900s were veneered with this highly flammable
to Identify your Clock