Wm. Hardy's timekeeper : a pre-release from the American Horologist & Jeweler, 1952.

By: Material type: TextTextPublisher: Denver : American Horologist and Jeweler, 1952Description: 19 pages : illustrations ; 23 cmContent type:
  • still image
  • text
Media type:
  • unmediated
Carrier type:
  • volume
Other title:
  • William Hardy's timekeeper : a pre-release from the American Horologist & Jeweler, 1952
Subject(s):

31560000082129 5033

William Hardy's spring escapement described by himself to the Society for the Advancement of the Art and Sciences London in 1820, including drawings (in 1952 reprint)

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