Name: Patek Philippe Aquanaut Travel Time "Advanced Research" 5650G-001
Brand: Patek Philippe
SKU: 5650G-001

The 5650G is a single-year Advanced Research edition that wrapped Patek's travel time complication in a 40.8mm white gold Aquanaut case and debuted two proprietary technologies: the Spiromax silicon balance spring and the Pulsomax silicon escapement, plus a flexible composite strap hinge called Caoutchouc. Produced only in 2017, it sits in the Advanced Research line that Patek uses to field-test materials and mechanisms before mainline production. Collector demand is real and consistent because the 5650G is both a working travel time watch and a documented technology milestone.

What it is

The Advanced Research series launched in 2005 as a platform for testing silicon-based movement components, and the 5650G is the fifth reference in the program. It uses caliber 324 S C FUS, a self-winding movement with an instantaneous-jumping local time display and a patented flexible strap attachment that eliminates the rigid lug-to-case junction found on standard Aquanaut references. Patek produced the 5650G in 2017 only, with official allocation through boutiques and select authorized dealers.

No subsequent production runs were announced, and no dial variants exist. The "FUS" suffix on the caliber designates the Spiromax/Pulsomax silicon component package.

Buying notes

Confirm the flexible strap hinge is intact and operates smoothly before purchase. The composite hinge mechanism is unique to this reference and cannot be sourced from a standard Aquanaut parts supply. Ask for the original Patek box, papers, and any Advanced Research documentation; the 5650G was delivered with reference materials explaining the technology, and a set without these raises authenticity questions.

The white gold case should show typical light surface wear only. Any polishing history significantly reduces collector value on a watch produced in this volume. Verify the silicon escapement has not been replaced with a conventional lever-and-balance assembly during a prior service, which would defeat the technical purpose of owning an Advanced Research piece.

Market read

The 5650G trades well above its original retail of approximately $65,000 USD. Auction results and private sale records from 2023 to 2025 place clean examples with full set in the $120,000 to $160,000 range, with exceptional examples occasionally crossing $175,000. The Advanced Research designation carries its own premium independent of the Aquanaut name, and that premium has held steady even as the broader luxury watch market softened in 2024.

Gray market supply is thin because original buyers have limited incentive to sell.

Service expectations

Caliber 324 S C FUS should be serviced approximately every ten years under Patek's current guidance, though the silicon escapement components require no lubrication and extend intervals compared to conventional movements. Factory service at a Patek Philippe service center is strongly recommended because the Pulsomax escapement and Spiromax spring require proprietary tooling and trained technicians. Expect service costs in the $2,500 to $4,000 USD range at an authorized center, depending on work required.

Editorial copy is AI-drafted from primary sources and reviewed by Grail Atlas before publication. Where the text is uncertain about a fact, it says so. Email corrections@grailatlas.com if something reads wrong. Signals on this page (community, OSINT) are clearly separated from the editorial sections.

Limited · 500 pieces#3 in familyOfficial press photos

Condition affects price

Pre-owned watches trade across a wide condition spectrum. These ranges are typical for the secondary market.

New Old Stock

Unworn example retaining original packaging, tags, and warranty documentation.

+30–50% vs median

Unpolished

Worn but the case has never been polished; original brushed and polished surfaces are intact.

+15–25% vs median

Polished

Case has been professionally or amateur polished at some point; edge definition is softened.

-15 to -5% vs median

Recently Serviced

Movement has been recently serviced with documented service records; case condition varies.

At median

Project

Needs service, has dial or hand issues, non-original parts, or other remediation before daily wear.

-50 to -25% vs median

Full condition grading guide →

Market price

$85,000–$120,000

gold·2026 Q2

Price trend chart coming soon

The 5650G Advanced Research Aquanaut incorporates Patek's flexible parachute shock absorber and was produced in limited quantity; secondary prices reflect scarcity and the watch's role as a technology showcase.

Editorial estimate, 2026 Q2. Actual prices vary by condition, date, and box/papers status.

Movement tier: unclassified · caliber Patek Cal. 324 S C FUS: automatic with date and second time zone, 28,800bph, 45h PR, 29j; Gyromax balance; used in Calatrava Pilot 5524G · 45h power reserve

Medium-large: suits wrists 6.5 in+ (16.5 cm+)

40.8 mm case. Wears confidently on average to larger wrists. May overhang on slender builds.

Not yet rated

Community + OSINT signals haven’t landed for this reference yet. We don’t publish a rating against zero signal: the number would mean nothing. Editorial body + caliber + market value still surface above; ratings appear once the signal corpus does.

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Authentication

Advanced Research edition requiring original papers confirming the designation; without documentation the Advanced Research value claim cannot be verified.

Known issues in the market

Advanced Research editions require specific edition documentation; without papers the Advanced Research designation and associated value premium cannot be verified.
The flexible bracelet material is unique to the 5650G Advanced Research; inspect the bracelet-to-case interface for the new material.

Area	What to check	What is correct	Red flag
bracelet	Advanced Research flexible bracelet material	Novel flexible material at the bracelet-to-case interface specific to the 5650G; noticeably different feel and flexibility from standard Aquanaut bracelet	Standard Aquanaut rubber bracelet without the Advanced Research material characteristics; may indicate a non-Advanced Research Aquanaut
dial	Aquanaut travel time dual time zone display	Dual time zone display with day/night indicator; both time zones readable and functioning correctly	Any non-functioning time zone display; missing day/night indicator
caseback	Cal. 324 S C FUS movement	Cal. 324 S C FUS confirmed through caseback or papers; Aquanaut case back profile	Any caliber other than 324 S C FUS; caseback inconsistent with 5650G specifications

Common legitimate replacements

Original Advanced Research documentation is non-replaceable; without papers the edition claim cannot be substantiated.

Expert resources: Patek Philippe Aquanaut Advanced Research 5650G product documentation. Patek Advanced Research edition records.

Authentication guide

Last reviewed June 2026

The 5650G is the Advanced Research edition of the Aquanaut Travel Time, featuring a flexible Spiromax hairspring and advanced regulator escapement. It was produced in limited quantities and serves as a technology showcase. Collector documentation suggests production numbers are low enough that provenance verification via serial and box/papers is essential.

Known reproduction risks

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HIGH RISK

Standard Aquanaut Travel Time (5164) watches represented as the Advanced Research edition, either by adding "Advanced Research" text or misrepresenting the reference number.

"Advanced Research" text absent on a stated 5650G example
Reference number on the case flank reading 5164 rather than 5650
Exhibition caseback showing a standard Cal. 324 S without the Silinvar Pulsomax escapement architecture
Escape wheel and pallet fork in conventional metal rather than the distinctive Silinvar grey-blue of the Pulsomax components

Box and papers authentication and Patek serial verification are mandatory for this reference given its limited production and high premium.

Dial variants by era

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Era	Description	Identifiers
2016 to 2019 (Advanced Research editions)	White gold Aquanaut with grey dial, travel time function, and dual-pusher operation.	Grey embossed Aquanaut "Tropical" octagonal grid dial texture Travel time local hour function with pusher at 10 (advance) and pusher at 8 (retard) "Advanced Research" text on the dial below the Patek Philippe text Day/night indicator for both home and local time Date window at 3 o'clock

Service part flags

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Dial

Original: Grey embossed octagonal grid "Tropical" texture. "Advanced Research" text is a printed designation below "Patek Philippe". The printing must be precisely spaced and aligned.

Replacement tells

"Advanced Research" text that is absent -- a standard Aquanaut Travel Time without this text is a different reference (5164)
Grey dial tone that appears too dark (charcoal) or too light (silver) rather than the specific mid-grey used
Embossed texture that is shallow or fades near the dial edges

Travel time pushers

Original: Two pushers integrated into the Aquanaut case flank at 8 and 10 o'clock. The local hour hand advances in one-hour increments per push.

Replacement tells

Single pusher or absent pushers at the 8 and 10 positions -- travel time function requires both
Pushers that produce smooth continuous motion rather than one-hour jumps

Case back markings

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2016 to 2019

Exhibition caseback displaying Cal. 324 S IRM QA LU movement with Advanced Research components
"Advanced Research" designation on the movement plate
"Patek Philippe" on the movement plate
Reference 5650G-001 and serial number on the case flank
18K white gold hallmark

Movement tells

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Cal. 324 S IRM QA LU incorporates the Spiromax balance spring made from Silinvar (silicon-based alloy), which is non-magnetic and dimensionally stable across temperature ranges that affect conventional hairsprings.
The Spiromax hairspring appears a deep blue-violet under magnification -- this is the characteristic color of the Silinvar material.
The Pulsomax escapement (also Silinvar) eliminates the need for lubrication on the escape wheel and pallet fork surfaces -- a watchmaker should not apply oil to these components during service.
Gyromax balance wheel with four gold weights; the free-sprung design is confirmed by the absence of regulator spring contact with the hairspring.
Given the low production quantities of this reference, every service should be documented by a Patek service center rather than a third-party watchmaker.

Sources: Patek Philippe Extract of the Archives service; Patek Philippe Advanced Research technical publication (available at authorized retailers).