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The Encyclopedia of Horology

Wristwatch · Time-only wristwatch

Greubel Forsey Signature 1 Stainless Steel

Partially verified

The Greubel Forsey Signature 1 is a manual-winding wristwatch characterized as the brand's first time-only model encased in stainless steel. This particular example is described as a piece unique, featuring a black gold dial and a frosted black mainplate. The movement includes an oversized balance wheel, a floating petite seconds hand, and a winding bridge with an integrated click spring. Development of the caliber was led by Didier J.G. Cretin over a period of approximately six years. The Signature 1 project, which limits total production to 66 examples across all material configurations, allows for the realization of designs by individual horologists within the workshop. The object is presented as an exclusive steel iteration within the broader Signature series.

Front view of the Greubel Forsey Signature 1 in stainless steel featuring an open-worked dial and black gold display.
Front view of the Greubel Forsey Signature 1 in stainless steel featuring an open-worked dial and black gold display. — Zamanito. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
zamanito.com
Category
Wristwatch · Time-only wristwatch
Maker / attribution
Greubel Forsey
Reference
Not recorded
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
2017
Source-reported place
سوئیس

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 stainless steel case, noted by the source as the first time-only implementation in this material for the maker. The aesthetic is defined by a minimalist approach with a dedicated time-only display.

The dial is constructed from black gold, providing a dark backdrop for the hour and minute indicators. The source describes the overall configuration as a unique piece, distinct within the larger production series of the model.

Evidence for this section
  • “این نمونه خاص در قالب یک پیکربندی منحصربه‌فرد (Piece Unique) ارائه شده که دربرگیرنده قاب فولادی، صفحه ساخته‌شده از طلای سیاه”

Movement and Construction

The movement was developed under the direction of Didier J.G. Cretin, a senior watchmaker at the company. The development process for this specific caliber spanned approximately six years, aiming to emphasize fundamental horological concepts.

Technical components include an oversized balance wheel and a floating petite seconds hand. The architecture incorporates a winding bridge equipped with an integrated click spring, with parts finished in a frosted black coating and blued screws.

Evidence for this section
  • “توسعه کالیبر این ساعت به سرپرستی دیدیه جی.جی. کرتین (Didier J.G. Cretin)، ساعت‌ساز ارشد و باسابقه مجموعه گروبل فورسی، حدود شش سال به طول انجامیده است”
  • “مشخصات فنی این مکانیزم شامل یک چرخ تعادل بسیار بزرگ اختصاصی (oversized balance)، عقربه ثانیه‌شمار کوچک شناور (floating petite seconds)، پل کوک مجهز به فنر ضامن یکپارچه و جزئیات اجرایی پیشرفته است”

Provenance and Series

The Signature project was established to allow individual watchmakers within the Greubel Forsey workshop to design and develop movements under their own names. This specific watch is part of a broader series limited to 66 total examples across all metal variations.

While the exact physical condition and service history are not detailed, the auction description reports that the images show the finishing of the movement and the state of the case. The platform does not independently verify the authenticity or technical descriptions provided by the seller.

Evidence for this section
  • “پروژه Signature در تاریخچه گروبل فورسی با هدف امکان‌پذیر ساختن طراحی و ساخت ساعت توسط ساعت‌سازان برجسته این کارگاه با نام اختصاصی خود آنان تعریف شد”
  • “در مجموع کل تیراژ مدل Signature 1 در تمامی متریال‌ها و فلزات مختلف تنها به ۶۶ نمونه محدود شده است”

Open research questions

  • What are the exact case dimensions of this steel Signature 1?
  • What is the specific power reserve for the caliber developed by Didier J.G. Cretin?

Source evidence

Recorded claims and source quotations for Greubel Forsey Signature 1 Stainless Steel
FieldSource-reported valueSource quotation
MakerGreubel Forsey“سازنده: Greubel Forsey”
ModelSignature 1“مدل: Signature 1”
Case MaterialSteel“جنس قاب: فولاد (Steel)”
Dial MaterialBlack Gold“صفحه ساخته‌شده از طلای سیاه”
Movement DeveloperDidier J.G. Cretin“توسعه کالیبر این ساعت به سرپرستی دیدیه جی.جی. کرتین (Didier J.G. Cretin)”
Production Limit66 examples total“در مجموع کل تیراژ مدل Signature 1 در تمامی متریال‌ها و فلزات مختلف تنها به ۶۶ نمونه محدود شده است”
Movement FinishFrosted black“صفحه اصلی موتور با پرداخت مات مشکی (frosted black mainplate)”

Visible details

  • Frosted black mainplate visible through the dial aperture
  • Oversized gold-tone balance wheel at approximately the 7 o'clock position
  • Blued screws visible within the movement structure
  • Small seconds sub-dial positioned at approximately 8 o'clock

Research qualifications

  • Total production of 66 units is a generalized claim for the Signature 1 line and not specific to this steel variant
  • The exact movement power reserve and case dimensions are not specified in the source

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

Consulted source

ساعت مچی Greubel Forsey مدل Signature 1 نسخه منحصربه‌فرد Steel

Reviewed 2026-11-02 · Record 6d0f5566bb

Terms in this record

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

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