Wotton Peter:
Anniversary Clocks
Shire Publications Ltd (United Kingdom), 2009
Paperback, 48 pages
Size: 210x149 mm
ISBN: 9780747807339
ISBN-10: 0747807337
List price: £5.99
You save: 30%
Anniversary Clocks
The mechanical anniversary clock, also known as the 400-day clock or torsion pendulum clock, is one of the most popular clocks ever invented. Anniversary clocks are recognizable by the decorative balls beneath the dial that rotate one way and then the other.

