First introduced in 1956 by Rolex, this is the Rolex Oyster Perpetual Milgauss, this is reference # 1019, circa 1968. Designed as an anti-magnetic watch to withstand a magnetic flux density of up to 1000 'Gauss'. Used by workers in power plants and labs. The word 'MILGAUSS' means 1000 gauss (the unit of measurement for a magnetic field). Very fine and rare!
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