This is a vintage Hamilton watch called the "Wilson" circa mid 1950's. It houses caliber 770, considered Hamilton's finest movement,, probably the last great American caliber produced.
Clarification: The hairspring is made of Elinvar Extra, Hamilton's improvement over the original Elinvar. The elasticity of hairsprings made with such alloys doesn't change much with temperature changes which will ultimately result in a watch with more accurate timekeeping.
The "L & K" that you see on the caseback stands for Lutringer & Kammerer Inc a New York based case company that Hamilton used.
Негізгі бет Hamilton Wilson Wristwatch
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