The Patek Philippe Nautilus Reference 3900/1JA is a "mid-size" or "boy-size" vintage watch produced between 1984 and 1995. This specific 33mm model is highly sought after for its 18k yellow gold and stainless steel "two-tone" construction combined with a classic champagne dial.

• Case Size: 33mm diameter.

• Materials: 18k yellow gold bezel and bracelet center links, paired with a stainless steel case and outer bracelet links.

• Dial: Champagne with horizontal embossing, featuring applied gold baton hour markers and a date window at 3 o'clock.

• Movement: Patek Philippe Quartz Caliber E23 SC with 7 jewels.

• Crystal: Scratch-resistant sapphire crystal.

• Bracelet: Integrated two-tone bracelet with a fold-over safety clasp.