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As one of the leading companies in the American watch industry prior to World War II and having already had experience supplying the military in the First World War, Hamilton was the natural choice to manufacture timepieces for the armed forces.

To support the war effort, Hamilton stopped all production franck muller replica watches of consumer goods to focus on production for the armed forces, producing over a million watches during the war. Hamilton made watches and other timepieces, as well as chronographs and other instruments, including chronometers.

For its high quality, Hamilton was awarded the US Army-Navy “E” Excellence in Manufacturing Award.

Wartime conditions required franck muller replica watches the brand to innovate— when traditional watch oils used for lubrication were discontinued by the war, Hamilton’s chemists developed new, high-quality oils, as well as a special, non-spreading compound.

Before World War II, Hamilton acquired the American rights to Elinvar (a non-magnetic alloy) franck muller replica watches for the manufacture of hairsprings. Alarmed by the quality discrepancies of Elinvar, Hamilton developed its own hairspring alloy, Elinvar Extra, which solved these problems.In 1943, Marvin E.Audemars Piguet Royal Oak Replica Whitney of the US Naval Observatory visited Hamilton's factory and said, “I was amazed at the quality control and care that went into producing the new alloy. It was like being in a medical laboratory&rdquo.