Watches : the Paul M. Chamberlain collection at the Art Institute of Chicago (1921)
Art Institute of Chicago · Chicago : The Institute · leaf 10
inuing now over two hundred years.The pendulum of the watch is the balancewheel, which turns first in one directionand then returns, each time winding up andunwinding the balance spring, which isso delicate that it frequently is called thehairspring. The desideratum of the per-fect watch is that… … CHINESE DUPLEX The train of wheels in the older watcheswere held between two plates, known asthe top plate and the pillar plate, the lat-ter being adjacent to the dial and carrying
Chamberlain, Paul Mellen, 1865-1940 · Clocks and watches
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