Hamilton Wristwatches by Date:1927
Movement 987 – 17 Jewels The 987 is a 6/0 size movement with 17 ruby and sapphire jewels. Hamilton improved the movement adding an Elinvar hairspring, mono-metallic balance wheel and improved friction jeweling. Hamilton used nickel plating for bridges and jewel plates. On the wristwatch side of the watch business, aviators kicked-off a spurt of […]
Hamilton Wristwatches by Date:1927 Read More »