Rolex Milgauss 116400

The Milgauss launched 1956 as antimagnetic watch for scientists and engineers working near magnetic fields. Name combines "mille" (thousand) and "gauss" (magnetic flux measurement)—referencing 1,000 gauss resistance. The reference 116400GV introduced 2007 reviving collection after twenty-year hiatus.

Forty millimetres in Oystersteel. Monobloc Oyster case construction. Smooth domed bezel. Soft-iron inner cage shielding movement from magnetic fields up to 1,000 gauss. Screw-down Twinlock crown. Green-tinted sapphire crystal—"GV" designation indicating glace verte (green glass). One hundred metres water resistance.

Black dial with applied hour markers and orange lightning bolt seconds hand—Milgauss signature since original reference. Orange "MILGAUSS" text at six o'clock. Inside sits Calibre 3131—Rolex automatic movement with paramagnetic blue Parachrom hairspring providing enhanced shock and temperature resistance. Forty-eight-hour power reserve. COSC chronometer certified.

Oystersteel Oyster bracelet with three-piece links and brushed finishing. Oysterclasp folding safety clasp. Very good condition from 2019 means six years of wear—expect moderate scratching on polished surfaces, dulling on brushed components, possible desk-diving marks on clasp, no significant damage. Full set includes Rolex presentation box, warranty papers dated 2019, booklets. Manufacturer's warranty expired—covered by Pride & Pinion one-year warranty.

The green sapphire crystal and orange lightning bolt seconds hand provide distinctive Milgauss identity whilst soft-iron cage and paramagnetic components deliver 1,000 gauss antimagnetic protection supporting scientific and engineering environments beyond standard watch specifications.