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The Encyclopedia of Horology

Wristwatch · Dual time wristwatch

Piaget Altiplano Dual Time, Ref. 612104

Partially verified

This late 1970s Piaget Altiplano Dual Time wristwatch is constructed in 18k white gold and features a 34mm diameter case with a hobnail-patterned bezel. The timepiece is characterized by its dual-time display, which utilizes two separate movements. The silver-colored dial is finished with guilloché engraving and includes two sub-dials—one silver and one black—each displaying time with Breguet numerals. Two winding crowns are positioned at the 3 and 9 o'clock positions to operate the independent Cal. 6P1 movements. The dial is co-signed by the London retailer Asprey at the 6 o'clock position. The watch is fitted with a black lizard leather strap. The auction description reports that the watch remains in excellent condition with well-preserved factory finishing on the case and no damage to the dial.

Front view showing the Piaget and Asprey signatures, dual-tone sub-dials, and hobnail bezel detail.
Front view showing the Piaget and Asprey signatures, dual-tone sub-dials, and hobnail bezel detail. — Craft & Tailored. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
craftandtailored.com
Category
Wristwatch · Dual time wristwatch
Maker / attribution
Piaget
Reference
612104
Catalogue / lot identifier
PGAT612104DT
Source-reported date
late 1970s
Source-reported place
Switzerland
Source-reported serial
28XXXX

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

Case and Design

The wristwatch is housed in an 18k white gold case measuring 34mm in diameter. A prominent design feature is the hobnail-patterned bezel that borders the perimeter of the case. Operation is facilitated by two slim, unsigned crowns located on opposite sides of the case at the 3 and 9 o'clock positions. The auction description reports that the case is in exceptional condition, maintaining original factory finishes with minimal evidence of polishing.

The case back exhibits engraved reference and serial numbers. The watch is currently paired with a two-piece black lizard leather strap. The original rhodium finish on the crowns is noted to have minor fading due to age and usage.

Evidence for this section
  • “The 18k white gold case, highlighted by its crisp hobnail bezel, remains in exceptional condition”
  • “The twin unsigned crowns at 3 and 9 o’clock are original to the watch”
  • “The case back retains strong factory finishing with deeply stamped reference and serial number engravings.”

Dial and Display

The silver dial features a guilloché pattern and serves as the mounting plate for two distinct sub-dials, one silver and one black. Each sub-dial displays the time using Breguet numerals and is operated by its own independent Cal. 6P1 movement. The dial is marked with the Piaget signature at 12 o'clock and the retailer name, Asprey, at 6 o'clock.

According to the auction description, the dial is preserved in exceptional condition without visible damage and displays only minimal, age-appropriate patina. The alpha-style hands for both sub-dials are reported to be original and in excellent condition, with the aging observed on the sub-dials described as negligible.

Evidence for this section
  • “The original silver guilloché dial, co-signed by Asprey, remains a true work of art and is preserved in exceptional condition”
  • “The opposing 12-hour sub-dials, each independently driven by its own Cal. 6P1 movement”
  • “The original alpha-style hands are equally well preserved and remain in excellent condition.”

Retailer and Attribution

Asprey is identified as the London-based retailer whose signature appears on the dial.

The source attributes the watch to the late 1970s, aligning with Piaget's historical production period for this model reference.

Evidence for this section
  • “Completing the dial is the Asprey signature at 6 o’clock, an enduring symbol of London luxury since 1847 and a storied retailer to royalty”
  • “This combination of an Asprey-signed guilloché dial, dual-time display, and elegant detailing results in a harmonious and highly collectible timepiece”

Open research questions

  • What is the specific production date range for the Caliber 6P1 movement used by Piaget?
  • Are there recorded examples of this specific dual-crown reference produced for other retailers besides Asprey?

Source evidence

Recorded claims and source quotations for Piaget Altiplano Dual Time, Ref. 612104
FieldSource-reported valueSource quotation
BrandPiaget“Brand Piaget”
Model612104“Model 612104”
Material18K White Gold“Material 18K White Gold”
Datelate 1970s“Dating to the late 1970s”
MovementCal. 6P1“opposing Cal. 6P1 movements”
Diameter34mm“Millimeters 34”
RetailerAsprey“co-signed by Asprey”

Visible details

  • Hobnail-patterned bezel
  • Two winding crowns located at the 3 and 9 o'clock positions
  • Dual sub-dials with opposing colors
  • Asprey signature printed on the lower half of the dial

Research qualifications

  • The exact serial number is partially redacted as 28XXXX in the provided source
  • The degree of rhodium finish fading on the crowns is subjective

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

Consulted source

ساعت Piaget Altiplano Dual Time 18K WG (Ref. 612104) با صفحه Guilloché و امضای Asprey

Reviewed 2026-11-02 · Record 84db027ff5

Terms in this record

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

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