商品の詳細

The Hamilton Grade 757 movement is a small, high-grade, adjusted caliber primarily used in ladies' vintage cocktail wristwatches, dating from its production period of approximately 1955 to the early 1960s. •Type: Mechanical, manual-wind. Jewels: 22 jewels. Country of Manufacture: Made in the U.S.A.. Dimensions: The movement size is 5.75 by 7.25 lignes (approximately 13.05 mm x 16.15 mm). •Frequency: Operates at 18,000 vibrations per hour (bph). •Power Reserve: It has a power reserve of approximately 40 hours. •Features: It features a Swiss lever escapement, Kif anti-shock device, screw balance, and a Breguet hairspring. The movement often has a beautiful Geneva stripe plate finish. •Aesthetics: Watches housing this movement were often considered jewelry pieces, known for their elegant, sometimes Art Deco, design sensibilities.