An important study of the earliest English balance-spring watches.
Marbled boards, not paginated but approximately 118 pages, numerous figs and charts. Privately produced by the author in 1998, in a severely limited edition of 50, of which this is No 14.
A rare work and essential reading about the introduction of the balance-spring by Thomas Tompion, Robert Hooke, and others, by someone who is greatly missed - Martin Ball died in December 2008.
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