Rolex, Oyster "Royal", Precision, Ref. 6427. Produced in the 1960's.Fine, center-seconds, water-resistant, stainless steel gentleman'swristwatch. | Important Collector's Wristwatches, Pocket Watches & Clocks | New York, 25th September 2003
Vintage Rolex Oyster Royal 6427 Black Dial - Rolex Forums - Rolex Watch Forum
No. 366 / Rolex Oyster Precision with Box and Paper - 1969 – From Time To Times