Updating…
Very fine and rare vintage Patek Philippe Nautilus two-tone 18K YG/SS quartz wristwatch, Ref. 3900/1, also as known as “mid-size Nautilus”, more seen as a unisex watch (even advertised as a small men’s version).
C. Two-body, solid, polished and brushed, sapphire crystal. D. Gold with horizontal stripes and 11 applied yellow gold baton indexes, aperture for the date. Luminous yellow gold “baton” hands. M. Cal. E 23 SC, 7 jewels, with quartz standardization. Dial, case and movement signed. Diam. 33 mm. Thickness 7 mm. Approx. overall length: 165 mm.