ROLEX | EXPLORER, REF 6610STAINLESS STEEL WRISTWATCH WITH BRACELETCIRCA 1958

Dial: black Calibre: cal. 1030 automatic, 25 jewels Movement number: N'826'652 Case: stainless steel, screw-down back Case number: 359'657 Closure: stainless steel Rolex Oyster bracelet and folding clasp Dimensions: 36 mm, bracelet circumference approx. 180 mm Signed: case, dial and movement Accessories: none

The explorer reference 6610 was introduced in 1955, with an upgraded movement - calibre 1030.  The slimmer movement allowed for a thinner case and more compact caseback from those earlier models using calibre A296.