Grandfather clock pendulum

Measuring – testing – or signalling instruments – Dial – indicator hand – or other element or attachment – Watch or clock element – or attachment

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D1007

Patent

active

D02692570

REFERENCES:
patent: 444433 (1891-01-01), Hammer
Seth Thomas Clocks, Cat. #441-1886-1887-p. 119-Clock with Mercurial Pendulum.
Trend Clocks Cat.-1978/1979-Lyre Pendulumed Clocks on front cover.

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