Watches : the Paul M. Chamberlain collection at the Art Institute of Chicago
A 1921 exhibition catalogue from the Art Institute of Chicago documenting Paul M. Chamberlain's collection of watches, issued for museum visitors and horological collectors. Halftone photographs show open pocket-watch movements, gear trains, engraved cocks and cases from the back, alongside line drawings that give plan and cross-section views of escapements with lettered part keys and a scale bar; useful for gear forms, circular mechanical layouts and technical diagram conventions.
