Wristwatch · Complicated automatic wristwatch with moonphase and power reserve

Patek Philippe Nautilus Ref. 3712 1/A '4 dot'

Partially verified

This Patek Philippe Nautilus reference 3712 1/A is a stainless steel wristwatch dating to 2006, according to Phillips. Built with a two-piece case reported as 42 mm in diameter, the model represents the short-lived predecessor to reference 5712. The dial features wide horizontal grooves, a power-reserve indicator in a '4 dot' configuration between 10 and 11 o'clock, subsidiary seconds between 4 and 5 o'clock, and an integrated pointer date and moonphase display at 7 o'clock with an adjacent miniature hour marker. The source states the watch is powered by the self-winding calibre 240PS IRM C LU and fitted with an integrated steel bracelet and deployant clasp.

Three-quarter front dial view of the Patek Philippe Nautilus Ref. 3712 1/A showing moonphase, date, subsidiary seconds, and power-reserve indicator. — Phillips. Rights pending — permission not yet requested. Original source

Catalogue identity

Source: perpetual.phillips.com
Category: Wristwatch · Complicated automatic wristwatch with moonphase and power reserve
Maker / attribution: Patek Philippe
Reference: Ref. 3712 1/A
Catalogue / lot identifier: Source URL identifies the listing
Source-reported date: 2006
Country: Switzerland

Source-reported attribution and specifications are not independent authentication. A listing does not establish present ownership, current display, availability or permission to reproduce.

Object description

Identity and Production Context

The Patek Philippe reference 3712/1A was introduced in 2005. The source describes the model as the first complicated Nautilus, featuring date and moonphase displays.

The production lifespan of the reference is reported as approximately one year, with some estimates suggesting as few as eight months. This specific example is dated to 2006.

Evidence for this section

“Patek Philippe introduced reference 3712/1A in 2005, and it remained in production for approximately one year, although some estimate as few as eight months”
“The model was at the time of its launch the first truly complicated Nautilus”
“Year 2006”

Case Construction and Dimensions

The stainless steel watch is reported to measure 42 mm in diameter. It is constructed using a two-piece case design.

The timepiece is fitted with a stainless steel deployant clasp.

Evidence for this section

“the present reference has a slightly smaller case measuring 42 mm in diameter, being constructed using only two pieces”
“Clasp/Buckle Stainless Steel Deployant Clasp”

Dial and Complication Configuration

The dial features wide grooves and hour markers. The layout includes a power-reserve indicator with four dots, a subsidiary seconds subdial, and a moonphase display with an integrated date ring.

The dial configuration includes a tiny 7 o'clock marker adjacent to the moonphase subdial.

Evidence for this section

“the dial of the reference 3712 features wider grooves, or channels, and different hour markers”
“The present example, is further enhanced by its "4 dot" power reserve configuration”
“The most apparent difference is however that the date ring is smaller in reference 3712, allowing for the presence of a tiny 7 o’clock marker”

Open research questions

What specific criteria define the '4 dot' versus earlier power reserve configurations within the 3712 production run?
Can the two-piece case construction be visually distinguished from the three-piece 5712 case by external markings or hallmarks?
Does the provided source document differentiate between 'International Guarantee' and 'Certificate of Origin' as separate items or redundant descriptions of the same document?

Source evidence

Recorded claims and source quotations for Patek Philippe Nautilus Ref. 3712 1/A '4 dot'
Field	Source-reported value	Source quotation
Manufacturer	Patek Philippe	“Manufacturer Patek Philippe”
Reference	Ref. 3712 1/A	“Reference Ref. 3712 1/A”
Year	2006	“Year 2006”
Metal	Stainless Steel	“Metal Stainless Steel”
Calibre	Cal. 240PS IRM C LU	“Calibre Self-winding (automatic) Cal. 240PS IRM C LU”
Case diameter	42 mm	“measuring 42 mm in diameter”

Visible details

Horizontally grooved dial with applied luminous hour batons and subsidiary seconds subdial.
Integrated date ring and moonphase display positioned at 7 o'clock with an adjacent tiny luminous marker.
Power-reserve indicator with four visible red dots positioned between 10 and 11 o'clock.
Integrated stainless steel bracelet with satin-finished lateral links and polished central links.

Research qualifications

Movement and case back are not visible in the provided photograph.
Case serial and movement numbers are not stated in the source text.

Photograph identity and source facts were screened before import; rights clearance remains pending.

Consulted source

Patek Philippe Nautilus Ref.3712 1/A "4 dot" | Patek Philippe Watch

Reviewed 2026-10-22 · Record fa9b113b12

Terms in this record

Glossary explanations for terms named in this object’s record.