Patek Philippe 5164A-001 is equipped with the automatic Caliber 324 S C FUS, designed to display dual time zones with independent local time adjustment. The 40.8 mm stainless steel case offers water resistance up to 120 meters and is paired with an embossed dial and composite strap. The Travel Time mechanism includes day and night indicators for both time zones and a date display synchronized with local time. The movement operates at 28,800 vibrations per hour with a power reserve of approximately 45 hours.

Built for active use, the 5164A-001 delivers reliable travel functionality within a sport-oriented design. Its combination of durability, comfort, and mechanical precision makes it a practical choice for collectors seeking a versatile dual time watch.

Patek Philippe Aquanaut Travel Time Ref. 5164A-001

Model: Aquanaut Travel Time
Reference: 5164A-001
Collection: Aquanaut
Introduced: 2011
Case Material: Stainless steel
Case Diameter: 40.8 mm, measured from 10 to 4 o’clock
Case Thickness: 10.2 mm
Crystal: Sapphire crystal
Case Back: Sapphire-crystal display back
Crown: Screw-down
Water Resistance: 120 m

Dial: Black embossed Aquanaut dial with applied gold numerals and luminous hour markers. A solid hour hand indicates local time, while a skeletonized hour hand indicates home time. Separate apertures show the day/night status for both time zones. A hand-type date indication at 6 o’clock is coupled to local time.

Movement: Patek Philippe Calibre 324 S C FUS
Movement Type: Self-winding mechanical
Functions: Two time zones, local and home time, local date, local/home day-night indications and sweep seconds
Movement Diameter: 31 mm
Movement Thickness: Approximately 4.9 mm
Components: 294
Jewels: 29
Power Reserve: 35–45 hours
Winding Rotor: 21K gold central rotor
Balance: Gyromax®
Balance Spring: Spiromax®
Frequency: 28,800 semi-oscillations/hour (4 Hz)
Quality Seal: Patek Philippe Seal.

Strap: Black composite/polymer Aquanaut strap with embossed pattern
Clasp: Stainless-steel Aquanaut fold-over clasp.

Travel Time Mechanism: The mechanism provides simultaneous local and home-time display. The local-time hour hand can be adjusted independently when travelling, while the home-time hand remains fixed. The date follows the local-time indication.

Alternative References & Configurations

The 5164 family has been produced in several precious-metal configurations:

* 5164A-001 — stainless steel; black embossed dial; black composite strap; Calibre 324 S C FUS. Primary configuration.
* 5164R-001 — 18K rose gold; brown embossed dial and matching brown composite strap; Calibre 324 S C FUS. Patek Philippe’s official historical documentation identifies this as the rose-gold counterpart to the 5164A-001.
* 5164G-001 — 18K white gold; blue-gray opaline embossed dial and matching blue-gray composite strap; newer Calibre 26-330 S C FUS.

Movement Generation Note: This distinction is particularly important. The original 5164A-001 and 5164R-001 belong to the 324 S C FUS generation, while the later 5164G-001 uses the newer 26-330 S C FUS. The latter has 290 components, 29 jewels, 4.82 mm movement thickness and a 35–45-hour power reserve.

Reference Distinction: Ref. 5164A-001 is specifically the stainless-steel Aquanaut Travel Time with black embossed dial and black composite strap, and should not be merged technically with the later white-gold 5164G configuration.