Chelsea Clock Co. 8 1/2" Library Clock for Tiffany & Co. Library clocks are very rare in any size. 8 1/2" examples are almost never seen. Note the symmetrical base with fine brass beading and the unusual bezel and back flange with coin edges. Serial number 68048 on the movement and case bottom dates the clock to 1910. The case has been expertly polished and lacquered. The dial has been resilvered. The movement has been serviced.