Wristwatch · Compass wristwatch

IWC Porsche Design Compass Watch Ref. 3511

Partially verified

This IWC Porsche Design Compass Watch, reference 3511, is a titanium-cased timepiece originally introduced in 1991. The watch features a minimalist black dial with a white crosshair design, yellow tritium luminous markers, and a date window at the 3 o'clock position. It is powered by the IWC caliber 375.23 automatic movement. Distinctive to this model is the ability to hinge open the case at the 6 o'clock position via two lateral push-buttons, revealing an integrated compass within the case structure. The watch is presented on an original flat-link titanium bracelet. According to the provided documents, this specific example was dated to 1993 and includes an original IWC booklet and a 2016 service invoice. The case is characterized by a 40.5 mm diameter and a ribbed, coin-edge finish, reflecting the industrial design language of the collaboration between IWC and Ferdinand Porsche.

IWC Porsche Design Compass Watch Ref. 3511 in titanium with original bracelet. — Bulang & Sons. Rights pending — permission not yet requested. Original source

Catalogue identity

Source: www.bulangandsons.com
Category: Wristwatch · Compass wristwatch
Maker / attribution: IWC
Reference: 3511
Catalogue / lot identifier: Source URL identifies the listing
Source-reported date: 1993
Source-reported place: Switzerland
Source-reported serial: 251xxxx

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 Design

The reference 3511 is constructed from titanium, featuring a distinctive ribbed or 'coin-edge' finish around the bezel and case profile. The watch incorporates a functional design element where the upper case section, housing the watch face, can be opened using two discreet push-buttons located at the 6 o'clock position on the case side, exposing an internal compass.

The black dial follows a minimalist aesthetic, featuring a thin crosshair layout. It is marked with yellow tritium luminous hour markers, white hour and minute hands, and a dark orange seconds hand. A date display is positioned at the 3 o'clock mark, and the dial is signed 'PORSCHE DESIGN by IWC' with a 'SWISS MADE' indicator at the bottom.

Evidence for this section

“titanium case with a ribbed or "coin-edge" finish”
“two discreet push-buttons open the watch face to reveal the integrated compass”
“dial was classic Porsche Design — minimalist and functional — with a thin crosshair layout”
“Black dial Signed Porsche Design IWC”

Movement and Technical Specifications

The timepiece is driven by the IWC caliber 375.23, an automatic mechanical movement. The watch maintains a case diameter of 40.5 mm. The crown is repositioned to the 4 o'clock position on the case, deviating from traditional placement.

The provided documentation notes that the watch includes a certificate of authenticity dated 1993 and a service invoice from 2016. According to the seller, the watch was fully checked and regulated by their watchmaker.

Evidence for this section

“IWC calibre 375.23”
“repositioned crown at 4 o’clock”
“This unique tool watch has been fully checked and regulated by our watchmaker”

Provenance and Documentation

The object is accompanied by a suite of original items confirming its history and maintenance. These include a certificate of authenticity issued in 1993, which corresponds with the production date of this specific example, and an original IWC booklet.

Further documentation includes an IWC service invoice from 2016, confirming maintenance work performed on the watch. The piece is fitted with its original IWC-manufactured flat-link titanium bracelet, which is stated to accommodate wrist sizes up to 20 cm.

Evidence for this section

“Included in the sale is a certificate of authenticity dated 1993, an IWC service invoice from 2016, and an original IWC booklet.”
“This example comes fitted on its original IWC flat-link titanium bracelet”

Open research questions

What specific calibration and maintenance tasks were performed during the 2016 IWC service?
Are there variations in the tritium lume aging for watches from the 1993 production run?

Source evidence

Recorded claims and source quotations for IWC Porsche Design Compass Watch Ref. 3511
Field	Source-reported value	Source quotation
Reference	3511	“Ref. 3511”
Case Material	Titanium	“titanium case”
Movement	IWC Caliber 375.23	“IWC calibre 375.23”
Date	1993	“Dates to 1993”
Serial Number	251xxxx	“Serial 251xxxx”
Case Diameter	40.5 mm	“40.5 mm Titanium case”

Visible details

Integrated compass hinge at 6 o'clock
Crown positioned at 4 o'clock
Flat-link titanium bracelet with matching finish
Date aperture located at 3 o'clock

Research qualifications

Tritium lume condition not independently verified
Full functionality of the integrated compass mechanics not demonstrated in photos

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

Consulted source

IWC/Porsche design compass watch in titanium ref 3511 with Certificate of Authenticity paper and IWC service invoice

Reviewed 2026-11-02 · Record 481e9a63b5

Terms in this record

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