The visionary creations of Charles Gérald Genta, one of the most talented watch designers the world has ever seen, included such masterpieces as the Polerouter Microtor for Universal Genève SA, Audemars Piguet’s Royal Oak, Patek Philippe’s Nautilus, IWC’s Ingenieur and Da Vinci, Omega’s Constellation and Titane, Cartier’s Pasha, and the Bvlgari-Bvlgari. Many of Gérald Genta’s timepieces are among the world’s most complicated.

Inventive and imaginative, in this Gérald Genta BiRetro Jump Hour timepiece the time is read via a window at 12 that displays the hour and a center arm that displays the minutes.

It truly is a treat to witness the retrograde arm spring back to 0 from its position at 60 while the hour jumps ahead an hour in time.

To double the pleasure, we also encounter a retrograde date function that spans the lower part of the gorgeous black-colored dial. The chunky Arabic numerals are a breeze to read at a glance.

This is classic Gérald Genta through and through—and everything here speaks to design aesthetics of the 1980s / 90s. The coin-edged stainless steel case is a textural bonus and measures a comfortable 36 mm in diameter and has a closed back. Look for a scratch-resistant sapphire crystal, a push / pull winding crown, and a stainless steel bracelet with a folding buckle.

As a self-winding automatic timepiece, we find the GA 4700 caliber driving the action here with 27 jewels and offering up 40 hours of power.

From the legendary status of Gérald Genta to the unique jumping hour and retrograde offerings, we believe this will make a curious and wonderful addition to your collection.

Standout features: Unique jumping hour; fascinating retrograde minutes and date functions; decorative winding crown and coin-edged case.

Details at a glance:

• Model Reference: G3734
• Case Material: Stainless steel
• Case Dimensions: 36 mm
• Case Height: 10 mm
• Movement: Self-winding automatic, 27 jewels, 40-hour power reserve
• Caliber: GA 4700
• Complication(s) / Feature(s): Jumping hour, retrograde minutes, retrograde date
• Dial: Black color
• Crystal: Scratch-resistant sapphire
• Winding Crown: Push / pull
• Water-resistance: 20 m / 2 atm (tested level)
• Band: Stainless steel bracelet (will fit up to 7 inches wrist)
• Clasp: Hidden folding buckle
• Country of Origin: Switzerland
• Condition: Pre-owned in very good condition; serviced in April 2025; the case and bracelet haven’t been polished and remain in their original condition; dial and crystal are very clean
• Comments: Includes original boxes, watch tag and open papers.