|Series||Datejust 31mm Stainless Steel|
|Model Number||278240 Black Roman Oyster|
|Case Material||Stainless Steel|
|Bracelet/Strap||Stainless Steel Brushed & Polished|
|Clasp||Rolex Concealed Folding Crownclasp|
|Movement||Automatic - Chronometer|
|Crystal||Scratch Resistant Sapphire|
Polished stainless steel case.
Polished stainless steel Twinlock crown.
Polished stainless steel domed bezel.
Applied polished Roman numeral hour markers.
Date window displayed at 3 o'clock with a cyclops magnifying lens.
Rolex in-house calibre 2236, beats at 28,800 vph (4Hz), contains 31 jewels & has an approximate power reserve of 55 hours. Features Syloxi hairspring in silicon with patented geometry, high-performance Paraflex shock absorbers & a bi-directional self-winding rotor.
This Watch has an alternate part number: