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Around 1900, the model 89 movement was introduced, having the escapement between the plates.The two types can be distinguished from the front of the clock by the position of the regulating square. 1901*) has the regulating square above the numeral "12".
In the 1860s, French clocks in slate, onyx or marble cases became popular in the United States.Adamantine veneer was made in black and white, and in colored patterns such as wood grain, onyx and marble. Seth Thomas Clock Company purchased the right to use the Adamantine veneer in 1881.Adamantine veneer was developed by the Celluloid Manufacturing Company of New York City, and was covered by U. Below are shown just a sampling of the many models of Adamantine clock made by Seth Thomas.The sisters would later graduate to become members of the coups de ballet and perform on the Opéra stage.Like the family of the model for Little Dancer, Aged Fourteen, (Philadelphia Museum of Art, 1986-26-11), the Mantes lived in the same neighborhood as Degas, the Montmartre section of Paris.