Watches : the Paul M. Chamberlain collection at the Art Institute of Chicago (1921)
Art Institute of Chicago · Chicago : The Institute · leaf 46
No. 128—GIRARD PERREGAUX TOURBILEON … No. 212—E. Howard & Co., Boston,9075. Mershons Patent April 36, 18.59,Reeds Patent 1857. Three-quarterplate, 15 jewels, compensated balance,key wind. Escapement and balancesimilar to preceding. The Mershonregulator has a rack segment on theregulator proper in which engages apin on the short arm…
Chamberlain, Paul Mellen, 1865-1940 · Clocks and watches
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