510549. WRISTWATCH, midsize, Rolex Oyster Perpetual Datejust Chronometer, automatic, cal. 2235, steel with white gold ring.
Housing Y677891 Ref 78274.
Dial diameter approx. 24 mm. Purchased at Nymans Ur, 2003.
Includes extra link parts.
Normal wear and tear. Renovated in 2011.