Clock, Sheep's-Head—A clock similar to the bird-cage or lantern clock in which the dial face projects an inch or two beyond the frame.
Clock, Skeleton—A clock whose works are covered with glass as a protection from dust, but are without a case, the works being exposed to view. There are eight skeleton clocks in the Charles Mifflin Hammond collection at the Essex Institute in Salem, Massachusetts.
Clock, Turret—A large clock in which the dials are distinct from the movement. Because of the exposure of the hands to the wind and snow, of the clock to dust and dirt, and of the oil to freezing temperature, turret clocks to keep time must be fitted with some device to obtain a constant force on the pendulum. The first used was the remontoire but since the invention of the gravity escapement for the Westminster clock by Sir Edmund Beckett this has been used instead.
Clock, "Wag on the Wall"—A wall clock typical of the North of Holland in which weights and pendulum hung below the clock case, entirely unenclosed.
Clock and Watch Makers, English, Early—For extensive lists, dates, places, and notes, see: Old Clocks and Watches & Their Makers, by Frederick J. Britten; Worshipful Company of Clockmakers, London, Published by E. J. Francis and Co., London, 1875; Old Clock Book, by Mrs. N. H. Moore.
French, Early—See: Old Clocks and Watches and Their Makers, by F. J. Britten.
Scottish, Early—For extensive list with dates, places and notes, see: Old Scottish Clock Makers, by John Smith.
Clock Makers, American, Early—For lists, dates, places, and notes, see: Old Clock Book, by Mrs. N. H. Moore; American Clockmaking—Its Early History, by Henry Terry.