Watches : the Paul M. Chamberlain collection at the Art Institute of Chicago (1921)
Art Institute of Chicago · Chicago : The Institute · leaf 16
d the detent in1782, invented simultaneously by Earnshaw,whose form is used at the present day.This example was made about 1860 byJoseph Sewill, 61 South Castle St., Liverpool, No. 23159. No. 18—Detached lever. The inventionof this escapement is quite universallyaccorded to Thomas Mudge, who…
Chamberlain, Paul Mellen, 1865-1940 · Clocks and watches
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