In solid 18K rose gold (Au750 5N), Patek Philippe Nautilus and Aquanaut references achieve an ultra-thin profile (8.3 mm to 12.2 mm) paired with substantial precious-metal mass: 186.8g for the Nautilus Ref. 5711/1R-001, 192.4g for the Moonphase Ref. 5712/1R-001, 218.5g for the Chronograph Ref. 5980/1R-001, and 144.2g for the Aquanaut Ref. 5167R-001.
Key Quantitative Laboratory Takeaways
- Despite measuring only 8.3 mm thick, the full-bracelet 18K rose gold Nautilus Ref. 5711/1R-001 weighs 186.8 grams thanks to its solid Au750 octagonal porthole case and tapering integrated bracelet.
- The Nautilus Moonphase & Power Reserve Ref. 5712/1R-001 houses the ultra-thin Calibre 240 PS IRM C LU with a recessed 22K gold micro-rotor, weighing 192.4g on a full 18K rose gold bracelet.
- The Flyback Chronograph Ref. 5980/1R-001 commands 218.5 grams of solid 18K 5N rose gold, powered by the self-winding CH 28-520 C column-wheel movement.
- Every Patek Philippe exhibition caseback at 18K Solid Gold Salon reveals a solid 21K or 22K gold winding rotor decorated with circular Cotes de Geneve and an engraved Calatrava cross.
| Reference Number | Model & Complication | Case Material | Case Dimensions | Verified Mass (g) | Clone Calibre & Rotor |
|---|---|---|---|---|---|
| Ref. 5711/1R-001 | Nautilus Time & Date (Brown Graduated Dial) | 18K 5N Rose Gold | 40.0 mm x 8.3 mm | 186.8g | Cal. 26-330 S C (21K Central Rotor) |
| Ref. 5712/1R-001 | Nautilus Moonphase & Power Reserve (Full Gold) | 18K 5N Rose Gold | 40.0 mm x 8.52 mm | 192.4g | Cal. 240 PS IRM C LU (22K Micro-Rotor) |
| Ref. 5712R-001 | Nautilus Moonphase on Alligator Fold-Over | 18K 5N Rose Gold | 40.0 mm x 8.52 mm | 106.0g | Cal. 240 PS IRM C LU (22K Micro-Rotor) |
| Ref. 5980/1R-001 | Nautilus Flyback Chronograph | 18K 5N Rose Gold | 40.5 mm x 12.2 mm | 218.5g | Cal. CH 28-520 C (21K Central Rotor) |
| Ref. 5990/1R-001 | Nautilus Travel Time Dual-Zone Chronograph | 18K 5N Rose Gold | 40.5 mm x 12.53 mm | 224.6g | Cal. CH 28-520 C FUS |
| Ref. 5167R-001 | Aquanaut 40mm Tropical Composite Strap | 18K 5N Rose Gold | 40.8 mm x 8.1 mm | 144.2g | Cal. 324 S C (21K Gold Rotor) |
| Ref. 5968R-001 | Aquanaut Flyback Chronograph Rose Gold | 18K 5N Rose Gold | 42.2 mm x 11.9 mm | 168.4g | Cal. CH 28-520 C |
Why Does the 8.3mm Ultra-Thin Nautilus 5711/1R Weigh 186.8 Grams?
First-time collectors of the Patek Philippe Nautilus Ref. 5711/1R-001 are often astonished by the density-to-thickness ratio of the watch on the wrist. Measuring just 8.3 mm in total height, the 5711/1R slips effortlessly beneath a French dress cuff yet registers an authoritative 186.8 grams on a Mettler-Toledo analytical balance. This mass derives from the three-part porthole case construction—incorporating solid 18K 5N rose gold lateral hinge ears—and the wide, flat-link integrated bracelet whose outer satin-brushed links and mirror-polished center links are milled from solid Au750 bar stock.
Unlike hollow-link vintage bracelets, every individual link on our Place Vendome 5711/1R and 5980/1R creations is solid 18-karat rose gold joined by precision pins and ceramic-ball-detent double deployant clasps, delivering silk-like articulation across the wrist.
How Do Calibre 240 Micro-Rotor and Calibre 324 S C Movements Perform?
True horological fidelity in a solid 18K rose gold Patek Philippe requires a movement whose bridge layout and winding mass match the ultra-thin case geometry. In our Nautilus Ref. 5711/1R and Aquanaut Ref. 5167R, the 3.30 mm cloned Calibre 324 S C / 26-330 S C operates at 28,800 vph (4 Hz) with a heavy 21-karat gold central rotor that winds smoothly on ceramic ball bearings. In the complicated Nautilus Ref. 5712/1R-001 and 5712R, the 3.98 mm cloned Calibre 240 PS IRM C LU integrates an off-center 22K gold micro-rotor flush into the bridge plane.
Every movement is regulated across six spatial positions on our Witschi Chronoscope X1 to a daily deviation within -1.5 to +2.0 seconds per day, with chamfered bridge edges and Geneva striping verifiable through the sapphire caseback.
| Calibre Designation | Movement Height | Frequency (vph) | Balance Wheel System | Winding Rotor Mass | 6-Position Witschi Rate |
|---|---|---|---|---|---|
| Cal. 324 S C / 26-330 S C | 3.30 mm Ultra-Thin | 28,800 vph (4 Hz) | Free-Sprung Gyromax Balance | Solid 21K Gold Central Rotor | -1.0 to +2.0 s/day (298 deg) |
| Cal. 240 PS IRM C LU | 3.98 mm Micro-Rotor | 21,600 vph (3 Hz) | Gyromax + Spiromax Spring | Off-Center 22K Gold Micro-Rotor | -1.5 to +2.0 s/day (288 deg) |
| Cal. CH 28-520 C | 6.63 mm Integrated Chrono | 28,800 vph (4 Hz) | Gyromax + Vertical Disk Clutch | Solid 21K Gold Central Rotor | -0.8 to +1.8 s/day (302 deg) |
Comparing Full-Bracelet 5712/1R (192.4g) vs. Strap-Mounted 5712R (106.0g)
Within the Nautilus Moonphase lineage, collectors choose between two distinct gravimetric profiles: the full 18K rose gold bracelet Ref. 5712/1R-001 weighing 192.4 grams, and the hand-stitched alligator or composite strap Ref. 5712R-001 weighing 106.0 grams. The 86.4-gram difference represents the solid 18K rose gold bracelet links, while the 5712R retains a heavy solid Au750 case, octagonal bezel, and solid 18K rose gold fold-over deployant clasp.
Both configurations display the asymmetric dial layout with power-reserve indicator between 10 and 11 o'clock, moonphase and pointer date at 7 o'clock, and subsidiary seconds at 4 o'clock over a horizontal embossed sunburst dial.
Explore Verified Patek Philippe Solid 18K Gold References in Our Register
Every timepiece referenced in this monograph is available for immediate allocation with pre-shipment 4K Mettler-Toledo gram weighing, Fischer XRF Au750 spectroscopy, and 6-position Witschi Chronoscope certification. Navigate directly to the 18K SOLID GOLD Homepage Master Register, the Patek Philippe Solid 18K Gold Collection Hub, or the Complete 774-Watch Catalogue:
Ph.D. in Precious Metal Crystallography (ETH Zurich), 22 Years in Geneva & Paris Horological Assaying.
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