Time is truly a journey with this handsome mahogany and brass clock by clockmakers Thwaites and Reed. Also known as a rolling drum clock, this timepiece uses a fascinating mechanical principle. Its movement, based on a design originating in 16th-century Europe, incorporates a seven-jewel lever escapement with hardened steel pinions and polished brass wheels, and is activated by simple virtue of its roll down an inclined plane. Balanced by means of eccentric weights, the descent is controlled so closely that the clock keeps remarkably good time.

This clock is truly a wonder of mechanical ingenuity. It takes exactly eight days to travel the length of the plane, its face remaining upright the whole way. The plane itself, angled with