15x15x4 A vintage square metal wall clock manufactured by the Self Winding Clock Co., Inc., of New York. This clock was utilized as part of the Western Union telegraphic time service, featuring a synchronization mechanism designed to align with United States Naval Observatory time. The square metal housing has a dark brown finish. The circular cream-colored dial displays black Arabic numerals and spade-style hands. Inscriptions on the dial include Naval Observatory Time, Western Union with a red lightning bolt logo, and Self Winding Clock Co. Inc. New York. The interior backplate contains a riveted metal identification tag stating Property of Self Winding Clock Co. Inc. New York, Movement No. 50148. The mechanical movement and internal wiring are accessible, as the dial and movement assembly are currently separated from the outer housing.