This replica Nautilus 57401G white houses a perpetual calendar inside a 40mm rose gold case with a white dial, referencing the 5740/1G-001 that Patek Philippe positions as the thinnest perpetual calendar Nautilus ever produced. The 240 Q ultra-thin caliber tracks day, date, month, leap year, and moon phase without requiring manual correction until the year 2100. In a Nautilus case, that level of complication is remarkable.

Case & Movement Specs

• Case diameter: 40mm
• Case material: rose gold
• Dial: white
• Crystal: sapphire
• Movement: automatic perpetual calendar (based on 240 Q)
• Functions: hours, minutes, day, date, month, leap year, moon phase
• Case profile: ultra-thin for a perpetual calendar

The 240 Q caliber uses a micro-rotor design rather than a full-size oscillating weight. This architectural choice is what allows Patek Philippe to fit a complete perpetual calendar mechanism into a case thin enough to maintain Nautilus proportions.

Caliber Breakdown

Perpetual calendars traditionally add significant case thickness, but the 5740/1G-001 avoids that penalty. The 240-series movement platform was designed from the ground up as an ultra-thin architecture, and the Q suffix indicates the calendar module integrated on top. Day and month display through apertures at 12 o’clock, date via a subdial, leap year through a small indicator, and moon phase at 6 o’clock. Explore more options within the Nautilus collection to compare this against simpler references. For a different take on the same 5740 case in a darker palette, the 5740/1G-001 brown dial version swaps the white face for chocolate tones while keeping every specification identical.

How It Compares

The 5740 competes directly with Audemars Piguet’s Royal Oak Perpetual Calendar for the title of thinnest luxury sports perpetual calendar. Both use ultra-thin movements inside integrated-bracelet cases, but the Nautilus silhouette gives the 5740 a different visual identity. White dial on rose gold reads dressier than most Nautilus configurations, bridging the gap between sports watch and formal complication piece. This replica Nautilus 57401G white captures that rare combination for collectors who want the most mechanically sophisticated Nautilus available.