Important Collectors’ Wristwatches, P...

New York - The Fuller Building, Mar 28, 2007

LOT 221

?Dietrich Gruen? Gruen Watch Co., Cincinnati, Ohio and Bienne, Switzerland, ?Dietrich Gruen?, No. 42468, case No. 104232. Made circa 1920. Very fine and rare, keyless, 14K pink gold dress chronometer with 32-hour power reserve indicator.

C. Four-body, "demi-bassine", polished, gold hinged cuvette. D. Champagne with stylized painted Arabic numerals, outer minute track, sector for the up-and-down indication, recessed subsidiary seconds dial. Blued steel "cathedral" hands. M. Cal. 250, rhodium-plated, 23 jewels, some in screwed gold chatons, straight line lever escapement, cut bimetallic "chronometer" compensation balance adjusted to temperatures, all positions and isochronism, blued steel Breguet balance spring, ?swan-neck? micrometer regulator, ?wolf?s-tooth? winding wheels. Dial and movement signed, case numbered. Diam. 47 mm.