Master regulator clock, 1837.

Thomas Tompion, English clock and watchmaker, c 1700s.

Wheatstone Polar Clock, 1848-1860.

Wheatstone Polar Clock, 1848-1860.

Wheatstone Polar Clock, 1848-1860.

Electric master clock of the half minute impulse type in mahogany case, c 1931.

Electric master clock of the half minute impulse type in mahogany case, c 1931.

Electric master clock of the half minute impulse type in mahogany case, c 1931.

Japanese woman winding up a wall clock, 1700-1750.

Japanese woman winding up a wall clock, 1700-1750.

Electric master clock, 1900.

Magic lantern slide with winding handle.