Anniversary Clocks, by Peter Wotton. 32 Pages. Softbound. The anniversary clock, also known as the 400-day clock or torsion pendulum clock, is one of the most popular clocks ever invented. This book is all about this attractive household timepiece and features hundreds of black & white photos of many different anniversary clocks and all their working parts. It also contains informative sections on the first makers, the pendulum assembly, early anniversary clocks, collecting, and more. For anyone interested in these fascinating and intricate clocks this illustrated reference is the one source you will need on the topic. UNAVAILABLE (BK-0887)