Name: Patek Philippe Nautilus Moon Phase Power Reserve 5712/1A-001
Brand: Patek Philippe
SKU: 5712/1A-001

The 5712/1A-001 packs moon phase, power reserve indicator, and date into the 40mm steel Nautilus case without looking overloaded , a genuine engineering feat given the dial real estate. Collectors who find the 5711 too restrained come here for complexity, and the integrated display at 6 o'clock pulls it off with unusual coherence. Steel, complications, and an in-production reference: the secondary market reflects exactly that combination.

What it is

Patek introduced the 5712 in 2006 as the first Nautilus to carry a triple complication, powered by the 240 PS IRM C LU , a peripheral-rotor automatic with moon phase, power reserve, and date modules layered on the 240 base caliber. The reference has been in continuous production since launch, with steel on the bracelet (5712/1A-001) as the entry point alongside subsequent launches in rose gold (5712R) and white gold (5712G). No significant dial generation change has altered the fundamental layout; minor finishing refinements have occurred over the years but nothing that creates meaningful vintage-versus-current arbitrage within the steel reference.

The 40mm case diameter is shared with the core Nautilus lineup, keeping proportions in line with the 5711 despite the additional movement height.

Buying notes

Moon phase discs are delicate: inspect the disc surface under magnification for chips, fading, or misalignment , replacing a damaged disc is a specialty job and not cheap. Power reserve displays on well-used examples sometimes show a sticky or inaccurate read; ask the seller for a full wind and a documented run-down before purchase. The bracelet on pre-2015 examples tends to show more stretch than equivalent 5711 bracelets of the same age because the 5712 skews toward buyers who wear it daily as a single watch.

Confirm all original paperwork specifies 5712/1A-001 exactly; early grey-market listings have occasionally muddled 5712 sub-references. Any service history should note caliber-specific complication work, not just a generic movement service.

Market read

The 5712/1A-001 trades at a meaningful premium over the 5711/1A-010 in the secondary market , typically 20-35% higher on comparable condition examples , reflecting the complication surcharge on top of the base Nautilus demand. Current retail is in the $55,000-$60,000 range; secondary market for clean examples with box and papers has been running $85,000-$110,000 depending on year and condition, with pre-owned dealer asking prices often higher. The premium compresses slightly when the broader Nautilus market softens because the 5712 buyer pool is narrower than the 5711's.

Unpapered examples take a sharper discount here than on simpler Nautilus references, given that complication provenance matters to buyers doing due diligence.

Service expectations

The 240 PS IRM C LU is a sophisticated movement and Patek recommends a full service every 3-5 years for watches worn regularly, though low-wear examples often run longer between services without issue. A full factory service , movement disassembly, complication module work, case and bracelet refinishing , runs $2,500-$4,000 at an authorized service center; complication-specific parts replacement can push that higher. Budget for service costs when buying a used example that cannot document recent work.

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.

Nautilus with moonphase and power reserve at a comparable secondary price to the 5711, offering substantially more complication.

Commonbest value#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

$52,000–$72,000

steel·2026 Q2

Price trend chart coming soon

The 5712A moon phase is one of the most liquid Nautilus references; strong collector demand and limited production keep secondary prices well above retail across all dial colors.

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

Movement tier: unclassified · caliber Patek Cal. 240 PS IRM C LU: ultra-thin automatic with pointer date, moon phase, and power reserve, 21,600bph, 38-48h PR, 29j; off-center mini-rotor; used in 5712 Nautilus · 48h power reserve (2 days) · see-through caseback · family design Gérald Genta

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

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

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Authentication

The Nautilus 5712/1A combines the most recognized sport-watch case in high horology with an in-house annual calendar. High-quality fakes target the steel/blue dial variant specifically.

Known issues in the market

Replicas of the 5712 are less common than the 5711 but have improved in quality; the moonphase and power reserve complications add components that are harder to replicate accurately.
Dial swaps from less desirable dial colors into blue steel cases occur in the secondary market.
The annual calendar mechanism requires a documented service history for confidence in complication function.

Area	What to check	What is correct	Red flag
dial	Horizontal stripe embossed texture	Identical embossed pattern to the 5711; crisp, even ridges that are tactile and cast shadow under directional light; consistent edge-to-edge	Flat or printed texture simulation; ridges that fade near the date windows or moonphase aperture
dial	Annual calendar apertures and moonphase disc	Day, date, and month displayed in dedicated windows; moonphase disc through the lower aperture shows correct disc color and star count for genuine Patek specification	Window borders that are uneven or misaligned; moonphase disc with incorrect star pattern or background color inconsistent with known production examples
movement	Cal. 324 S QA LU annual calendar mechanism	Cal. 324 S QA LU features the Patek annual calendar mechanism that auto-corrects for months of 30 and 31 days; moonphase deviation is under one day per 122 years; Geneva seal visible on bridges	Non-Patek annual calendar mechanism; absence of Geneva seal; calendar that requires manual correction for 30-day months
case	Porthole octagonal bezel integration	Eight-sided bezel integrates flush with the rounded case flanks; polished bevels and brushed panels alternate correctly; no gap at the bezel-to-bracelet junction	Visible step at bezel-to-case junction; bevels eroded by polishing; octagonal geometry with incorrect lug proportions
bracelet	Integrated Nautilus bracelet finishing	Brushed center links with polished edges; bracelet tapers toward the Patek folding clasp; clasp engraving in correct PP typeface	Center links with incorrect brushing direction; bracelet that does not taper correctly; clasp typography inconsistent with Patek production standard
caseback	Exhibition caseback with movement view	Clear display caseback; Cal. 324 S QA LU visible with Patek finishing; caseback engraved with reference 5712/1A and serial on case flank	Non-Patek movement visible; caseback in incorrect Patek typeface; serial inconsistent with known 5712 production

Common legitimate replacements

The moonphase disc is an AP service item; confirm correct disc specification when purchasing.
Bracelet pins and clasp are common service replacements; confirm correct PP fittings.
Crystal replacement is standard; confirm correct sapphire.

Expert resources: Patek Philippe boutiques provide authentication via serial lookup and Extract of the Archives service. Phillips and Christie's watch specialists handle 5712 authentication for pre-sale regularly. WatchUSeek Patek forum for community-level guidance on variant identification.

Authentication guide

Last reviewed June 2026

The 5712/1A combines the most recognized sport-watch case in high horology with an in-house annual calendar and moonphase. Replica quality is improving; the annuaire calendar function and moonphase disc specifics are the strongest verification points.

Known reproduction risks

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HIGH RISK

High-quality replicas targeting the 5712 blue dial steel configuration.

Dial horizontal embossing that is flat or printed under directional lighting instead of genuinely tactile
Calendar aperture borders that are uneven or misaligned with the dial surface
Moonphase disc with incorrect star detail, background color, or moon image proportions
Exhibition caseback showing a non-Patek movement or a movement without Geneva Seal finishing

MEDIUM

Correct-case examples with a simpler calendar module substituted for the annual calendar mechanism.

Calendar that requires monthly correction for 30-day months -- a perpetual or standard calendar was substituted
Date advance that is gradual rather than the instantaneous Patek jump

For any 5712 transaction at the current secondary market level, authentication from Phillips, Christie's, or a Patek-authorized dealer is the responsible standard.

Dial variants by era

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Era	Description	Identifiers
2006 to 2021 (blue dial)	Steel case with blue horizontal-striped dial, annual calendar apertures, power reserve indicator, and moonphase.	Blue horizontal embossed stripe texture -- identical to the 5711 but with three date apertures and a moonphase at 6 Day, date, and month windows at the upper and lower portions of the dial Moonphase disc visible through a lower-left aperture with deep blue background and applied star detail Power reserve indicator sector at the lower right "Annual Calendar" text below the center time display

Service part flags

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Dial (horizontal embossed texture)

Original: Same horizontal embossed stripe pattern as the 5711. The embossing must remain crisp and tactile even around the calendar aperture edges where dial manufacturing is most demanding.

Replacement tells

Embossing that fades or becomes less defined near the calendar aperture borders -- indicates dial replacement with a lower-quality substitute
Applied "Patek Philippe" text that lacks three-dimensional quality under directional lighting
Flat or printed texture simulation in place of the genuine embossed pattern

Annual calendar mechanism (day/date/month)

Original: The annual calendar corrects automatically for months of 30 and 31 days. Only February requires a manual correction each year. The date should advance instantaneously at midnight.

Replacement tells

Calendar that requires manual monthly correction for 30-day months -- indicates the annual calendar mechanism has been replaced with a simpler perpetual or standard calendar
Date advance that is slow rather than instantaneous at midnight
Aperture window borders that are misaligned or show gaps between the aperture frame and dial surface

Moonphase disc

Original: Patek moonphase disc under the lower-left aperture. Deep blue background with applied gold star detail. The disc deviation is less than one day per 122 years per Patek specification.

Replacement tells

Moonphase disc with incorrect star count or background color inconsistent with known Patek 5712 production examples
Non-Patek disc with a flat printed moonphase rather than an applied star detail
Moon image proportions that do not match known 5712 examples

Case back markings

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2006 to 2021

Exhibition caseback showing Cal. 324 S QA LU
"Patek Philippe Geneve" in correct typeface on the caseback outer ring
Reference 5712/1A engraved on the caseback or case band
Serial on the case band at 9 o'clock position
Geneva Seal visible on the bridges through the display caseback

Movement tells

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Cal. 324 S QA LU: the QA stands for quantieme annuel (annual calendar) and LU for lune (moonphase). This movement is specific to the 5712; Cal. 324 S C (the 5711 movement) has no calendar module.
Annual calendar mechanism test: advance the date manually through several month boundaries. The calendar should auto-correct without intervention for 30-day and 31-day months; only February requires manual correction.
Geneva Seal finishing: all visible bridges through the caseback should carry the Geneva Seal striping, polished chamfers on all edges, and blued screws. Non-Patek service finishing will deviate from these standards.
Moonphase accuracy: a correctly functioning Patek moonphase deviates by one day in approximately 122 years. While this cannot be verified in an inspection, a Patek service record confirming Cal. 324 S QA LU is the best available document.

Sources: Patek Philippe boutique -- serial lookup and Extract of the Archives; Phillips Watches -- authenticated 5712 auction archives; WatchUSeek Patek Philippe forum -- 5712 variant identification and authentication threads.