Maker unknown, 5"w x 8"h x 3"d net of base and dome. A rare clock made primarily of ivory or possibly bone, c. mid 1800's. Two train, count wheel hour strike. Bell in wooden base. Arbors, spring barrels, hands and strike levers made of steel or brass. The use of the fusee suggest an English origin, but this could possibly be French. It shares many similarities in its' construction, wheels and frame design with the single train clocks featured in British Skeleton Clocks, pg. 249 and Continental and American Skeleton Clocks, pg. 113 (both books authored by Derek Roberts). This, however, is the only example of a clock with two trains (time and strike) constructed from this material that I know of.