One of the top lots at Antiquorum’s Geneva auction that happens in May 2026 is the hitherto unknown and likely unique Patek Philippe Nautilus ref. 3700/13. It is a striking combination of yellow gold for the case and bracelet, a diamond-set bezel, and a rose gold dial with brilliant-cut diamond indices.

Ordinarily a Nautilus “Jumbo” at auction would not be especially intriguing, but this one stands out for a few reasons.

For one, the aesthetic is peculiar but attractive. The combination of a pink dial with diamonds on a yellow gold case is a strange one, but the watch is unexpectedly appealing. Even the small diamonds on the bezel add to the appeal.

Moreover, the watch comes from the family of the original owner – and even includes the original certificate.

Pink on yellow

Consigned to Antiquorum by the grandson of the first owner, this Nautilus “Jumbo” is the only one of its type known and most probably unique. According to Antiquorum, the only other ref. 3700 with a special dial is the prototype with a white dial that sold at Sotheby’s about a decade ago.

Notably, the watch includes its original box and more crucially, the original certificate that states the dial is “or rose, index brillants”. The certificate reveals the watch was sold in 1984 at Somazzi, a retailer in Lugano. Also included is an invoice from Gübelin from a year for an additional link.

The case bears the serial number “559215”, with “215” also engraved on the flank of the bezel, as is correct for this model.

The ref. 3700/13 is lot 285 in Antiquorum’s upcoming Geneva auction that takes place on May 9 and 10, 2026. The estimate is CHF1.0-2.0 million.