Rolex Submariner 41mm Black Dial Rl426 621388
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Cerachrom is Rolex's trademark for the ceramic bezel insert technology, first introduced 2005 on the GMT-Master, rolled to the Submariner in 2008, and the line hasn't moved off ceramic since. Cerachrom won't scratch from desk-wear, won't fade in UV exposure; the only failure mode is impact-shatter.
Reference 621388 keeps the Cerachrom-spec configuration in the 41mm Submariner-style case. Black sunburst dial, applied Maxi-Dial indices with lume centres in polished outlines, mercedes hands. 120-click unidirectional bezel rotation with the lumed pip at 12.
Three-link Oyster bracelet, polished side bevels, brushed flat top, Oysterclasp folding mechanism. Japanese Miyota 9015 movement, 4 Hz beat, 42-hour autonomy. Screw-down crown at 3. Cyclops over the date wheel at 3 magnifying 2.5×.
