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The Encyclopedia of Horology

Wristwatch · Chronograph wristwatch

Porsche Design by Orfina Chronograph 1

Partially verified

This Porsche Design by Orfina Chronograph 1, reference 7176D, is a vintage wristwatch dating to the 1970s. The watch features a 40mm sandblasted steel case paired with a matching matte three-row steel bracelet. It is powered by the Lemania 5100 movement. The black dial contains three chronograph sub-dials, an internal tachymeter scale, and day-date windows displaying text in German. The hour markers and hands include tritium material, which has developed a yellow patina. A prominent orange central chronograph seconds hand provides a high-contrast detail against the dark dial. This specific example has undergone mechanical servicing.

Front view of the Porsche Design by Orfina Chronograph 1 showing the matte sandblasted finish and the German-language day/date display.
Front view of the Porsche Design by Orfina Chronograph 1 showing the matte sandblasted finish and the German-language day/date display. — Bulang & Sons. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.bulangandsons.com
Category
Wristwatch · Chronograph wristwatch
Maker / attribution
Orfina
Reference
7176D
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
1970s
Source-reported place
Not established
Source-reported serial
2031xxxx

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 Dial

The watch is housed in a 40mm steel case characterized by a grey sandblasted finish. The construction includes a semi-integrated bracelet that transitions directly into the case profile, maintaining a matte texture consistent with the watch head. The lugs are defined by sharp edges.

The black dial is arranged with three sub-dials for chronograph tracking. An internal tachymeter bezel is positioned on the periphery of the dial. The day and date indicators utilize German-language wheels. The indices and hands feature tritium lume that has patinated to a yellow tone, contrasting with the orange central chronograph seconds hand.

Evidence for this section
  • “41mm grey sandblasted case remains sharp with strong lines”
  • “three sub-dials, German-language day and date windows, and a bold orange chronograph seconds hand”
  • “tritium lume has aged to a warm yellow patina”

Movement and Functionality

The watch operates using the Lemania 5100 chronograph movement. This automatic caliber drives the hour, minute, and central chronograph seconds functions, alongside the day and date display. The auction description notes that the movement has been serviced to ensure current functionality.

Mechanical operation is controlled through the crown and lateral pushers. The internal bezel serves a tachymetric function for speed calculation, integrated within the main dial assembly rather than the exterior case, which is consistent with the model's design specifications.

Evidence for this section
  • “Inside ticks the legendary Lemania 5100—fully serviced and ready to go”
  • “Lemania 5100 movement”
  • “Fully serviced by our watchmaker”

Signatures and Branding

The branding reflects a collaboration between the Porsche Design studio and the watchmaker Orfina. The dial features the 'Porsche Design' wordmark. The bracelet is fitted with the PD-signed clasp, identifying the components as specific to the model family.

The watch is linked to the 1970s period through its serial number sequence. The design reflects the visual language established during the initial development of the Chronograph 1 model under the guidance of Ferdinand Porsche.

Evidence for this section
  • “designed with direct input from none other than Ferdinand Porsche himself”
  • “watch comes on its original PD-signed three-row bracelet”
  • “Serial 2031xxxx dates to the 1970s”

Open research questions

  • Does the 41mm case dimension listed in the narrative conflict with the 40mm dimension in the specifications table?
  • Is the serial number prefix 2031 traceable to a specific year of production within the 1970s?

Source evidence

Recorded claims and source quotations for Porsche Design by Orfina Chronograph 1
FieldSource-reported valueSource quotation
MakerOrfina“Porsche Design by Orfina Chronograph 1”
Reference7176D“Reference 7176D”
Serial2031xxxx“Serial 2031xxxx dates to the 1970s”
MovementLemania 5100“Lemania 5100 movement”
Case diameter40mm“40mm steel sandblasted case”
Dial languageGerman“Black dial with day and date windows in German language”
Bracelet typeThree-row matte sandblasted“Porsche Design 3 row steel matte sandblasted bracelet”

Visible details

  • Case and bracelet possess a uniform sandblasted finish
  • Day and date wheels appear in German (e.g., 'SON', 'SAM')
  • Tritium indices show age-related yellow discoloration
  • Internal bezel features a printed tachymeter scale

Research qualifications

  • The exact year of manufacture within the 1970s is not specified beyond the serial number range
  • The degree of originality regarding the luminous material patina is not verified

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

Consulted source

ساعت مچی Porsche Design by Orfina مدل Chronograph 1 رفرنس 7176D

Reviewed 2026-11-02 · Record 22602e1d04

Terms in this record

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

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