Late-1930s production Rolex Oyster Bubbleback Ref. 3599, an exceptionally rare steel hooded model featuring a two-tone sector dial.
Among the many Bubbleback variations, Ref. 3599 stands out as particularly scarce, distinguished by its flat bezel and the substantial, powerful presence unique to the steel hooded case. The highly sought-after “three-sector” dial (so-called “Sanbaka”) further enhances the rarity of this piece, while its beautifully aged patina showcases an outstanding vintage character.
This is a valuable double-signed example, bearing the signature of the Scottish jeweler “FORBES” of the United Kingdom.