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The Encyclopedia of Horology

Wristwatch · Manual-wind wristwatch

1960s IWC Calatrava-style Wristwatch Ref. R1205

Partially verified

This men's wristwatch from the 1960s is manufactured by IWC and identified by reference R1205. The timepiece features an 18K yellow gold case measuring 35mm in diameter, housing an IWC caliber 401 hand-wound movement. The dial is white and includes applied gold indices and yellow gold hands, with "International Watch Co. SCHAFFHAUSEN" and "SWISS" inscriptions. The exterior of the case exhibits a rosy patina. The watch is presented on a two-piece handmade leather strap. The auction description notes that the crown is unsigned and that the case shows minimal signs of past polishing. This piece is categorized as a Calatrava-style design by the source, reflecting the aesthetic characteristics of that watch configuration. It was recently serviced and is supplied without additional accessories.

Front view of the IWC R1205 in 18K yellow gold, showing the white dial and gold indices.
Front view of the IWC R1205 in 18K yellow gold, showing the white dial and gold indices. — Craft & Tailored. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
craftandtailored.com
Category
Wristwatch · Manual-wind wristwatch
Maker / attribution
IWC
Reference
R1205
Catalogue / lot identifier
IWCCAL401
Source-reported date
1960s
Source-reported place
Switzerland
Source-reported serial
17XXXXX

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 18K yellow gold case measures 35mm in diameter. The source reports that the case retains presentable dimensions and displays minimal signs of previous usage. A characteristic feature of this specific example is a rosy patina across the gold surfaces, which is interpreted by the source as an indication of minimal polishing performed on the watch during its history.

The dial is white and is described as being in a virtually flawless condition. It features applied gold indices and yellow gold hands. The inscriptions on the dial read "International Watch Co. SCHAFFHAUSEN" and "SWISS" at the base. The unsigned crown is noted as being original to the timepiece for this period.

Evidence for this section
  • “The 18K yellow gold case is simply exceptional, retaining very crisp and presentable dimensions with minimal signs of previous use present.”
  • “The case features a lovely rosy patina throughout, a sign of minimal polishing in the watch's past.”
  • “The elegant and simple white dial is in superb, virtually flawless condition and has taken on a lovely warm patina.”

Movement

The watch is powered by the IWC caliber 401, a hand-wound mechanical movement. The source identifies this movement as an updated iteration of the company's caliber 89. This caliber 401 is positioned as the primary timekeeping component within the R1205 reference case.

According to the documentation provided, the watch has recently undergone a service and is reported to maintain time accurately.

Evidence for this section
  • “the cal. 401 beating within this reference R1205 is the updated version of that iconic movement.”
  • “The watch was recently serviced and is keeping time perfectly, backed by a 1-year warranty on accurate timekeeping”

Provenance and Presentation

This timepiece is identified by the stock number IWCCAL401 and is dated by the source to the 1960s. The watch is currently supplied on a two-piece handmade leather strap. No original boxes, manuals, or associated papers are included with this object.

The object is attributed to the International Watch Company based in Schaffhausen, Switzerland.

Evidence for this section
  • “Founded more than 150 years ago, the International Watch Company has grown to become one of the most recognizable Swiss watch brands on the planet.”
  • “The watch will come supplied on a 2pc handmade leather strap.”
  • “ACCESSORIES None.”

Open research questions

  • What is the specific production date range for IWC caliber 401?
  • Does the rosy patina on the case correlate to a specific metallurgical alloy composition used by IWC in the 1960s?

Source evidence

Recorded claims and source quotations for 1960s IWC Calatrava-style Wristwatch Ref. R1205
FieldSource-reported valueSource quotation
Dial ColorSilver“Dial Silver”
MovementCaliber 401“cal. 401 beating within this reference R1205 is the updated version of that iconic movement”
Diameter35mm“Millimeters 35”
Case conditionMinimal polishing“The case features a lovely rosy patina throughout, a sign of minimal polishing in the watch's past.”

Visible details

  • Case displays a rosy patina
  • Dial is white with applied gold indices
  • Crown is unsigned
  • Lug width is consistent with a leather strap

Research qualifications

  • Full serial number is partially obscured in records
  • Exact service history or original purchase context is not documented

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

Consulted source

ساعت مچی IWC Calatrava طلای زرد ۱۸ عیار رفرنس R1205 کالیبر 401

Reviewed 2026-11-02 · Record 0bede7d44e

Terms in this record

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

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