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The Encyclopedia of Horology

Wristwatch · Chronograph wristwatch

Heuer Skipper Ref. 15640 Mk. I

Partially verified

This Heuer Skipper, reference 15640, is a Mk. I variant chronograph wristwatch designed for yacht racing. It is equipped with a specific 15-minute regatta countdown sub-dial colored in red, white, and blue, segmented into five-minute intervals for racing start timing. The watch is powered by the Heuer Calibre 15 automatic movement. The timepiece is housed in a tonneau-shaped stainless steel case measuring 42mm, paired with a bidirectional ratcheting blue bezel featuring a tritium pearl at the 12 o'clock position. The matte blue dial includes tritium-filled hour markers and matching original hour and minute hands. The watch features fluted pump pushers and a signed Heuer crown, and is currently supplied on a two-piece handmade leather strap. The auction description reports that the case has undergone a light polish in the past and retains its original finishing.

Front view of the Heuer Skipper Ref. 15640 showing the matte blue dial, regatta sub-dial, and bidirectional blue bezel.
Front view of the Heuer Skipper Ref. 15640 showing the matte blue dial, regatta sub-dial, and bidirectional blue bezel. — Craft & Tailored. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
craftandtailored.com
Category
Wristwatch · Chronograph wristwatch
Maker / attribution
Heuer
Reference
15640
Catalogue / lot identifier
HURAUTSK2
Source-reported date
1972
Source-reported place
Switzerland
Source-reported serial
30XXXX

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 Bezel

The watch features a 42mm tonneau-style stainless steel case. According to the seller, the case has been lightly polished in the past but retains its original finishing, chamfers, and strong dimensions. It is fitted with fluted pump pushers and a signed Heuer crown.

The timepiece includes a bidirectional ratcheting blue bezel. The bezel assembly contains a tritium pearl at the 12 o'clock position. The seller notes that the bezel shows no major signs of use or fading, and the case back remains free of significant damage.

Evidence for this section
  • “The beautiful tonneau style case is in excellent condition”
  • “the case received a light polished in its past and retains strong dimensions, chamfers, and finishing.”
  • “The case retains its original Heuer signed crown and fluted pump pushers.”
  • “The original bidirectional ratcheting bezel blue bezel is in superb condition, showing no major signs of use or fading, and retains its tritium pearl at the 12 o'clock position.”

Dial and Hands

The Mk. I dial is matte blue and features a regatta countdown sub-dial. The sub-dial is divided into red, white, and blue sections to facilitate timing during the lead-up to a yacht race, with numerals at 10, 5, and 0.

The markers and hands retain their original tritium luminous material, which has developed a creamy patina. Under U.V. light, the hour hand shows no degradation, while the minute hand exhibits minor, stable cracking. The dial itself is reported as being well preserved without blemishes.

Evidence for this section
  • “The gorgeous matte blue Mk. I dial is exceptionally well preserved showing no blemishes or signs of age.”
  • “The large regatta count down sub-dial is in excellent condition”
  • “the original tritium hour and minute hands match the dial patina nicely”
  • “under U.V. light inspection the minute hand shows some minor cracking and remains stable”

Movement and Function

The Heuer Skipper Ref. 15640 is powered by the Heuer Calibre 15 automatic chronograph movement. This specific movement manages the central timekeeping and the regatta countdown function.

The watch serves as a tool for yacht racing, with the sub-dial providing a 15-minute countdown display. The specific Mk. I configuration features numerals indicating the 10, 5, and 0-minute marks.

Evidence for this section
  • “the famed Heuer cal. 15 automatic movement.”
  • “starring a large, colorful 15-minute counter for tracking the countdown start of a yacht race.”
  • “the simpler count down sub-dial that only reads the 10, 5, and 0 numerals”

Open research questions

  • Verification of the Calibre 15 movement production range for serial 30XXXX.
  • Confirmation of the specific assembly period for the Mk. I tonneau-cased Skipper.

Source evidence

Recorded claims and source quotations for Heuer Skipper Ref. 15640 Mk. I
FieldSource-reported valueSource quotation
BrandHeuer“Brand Heuer”
Reference15640“Model 15640”
MovementHeuer cal. 15“the famed Heuer cal. 15 automatic movement”
Serial number30XXXX“Serial 30XXXX”
Dial colorBlue“Dial Blue”
Case materialStainless Steel“Material Stainless Steel”
BezelBidirectional ratcheting“The original bidirectional ratcheting bezel blue bezel is in superb condition”

Visible details

  • Matte blue dial with regatta countdown sub-dial
  • Bidirectional ratcheting bezel with tritium pearl
  • Tonneau-shaped stainless steel case
  • Fluted pump chronograph pushers

Research qualifications

  • Minor cracking on the minute hand under U.V. inspection
  • Historical light polish of the case

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

Consulted source

ساعت مچی کرنوگراف Heuer Skipper رفرنس 15640 مدل Mk. I

Reviewed 2026-11-02 · Record aff2ab1094

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