Overview

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IWC. A rare stainless steel military wristwatch with sweep centre seconds, hack feature and Certificate of Genuineness, supplied to the British Royal Air Force
On lots marked with an + in the catalogue, VAT wil… Read more The Property of a Private European Collector
IWC. A rare stainless steel military wristwatch with sweep centre seconds, hack feature and Certificate of Genuineness, supplied to the British Royal Air Force

SIGNED INTERNATIONAL WATCH CO., MARK XI MODEL, MOVEMENT NO. 1’162'085, MANUFACTURED IN 1948

Details
IWC. A rare stainless steel military wristwatch with sweep centre seconds, hack feature and Certificate of Genuineness, supplied to the British Royal Air Force
Signed International Watch Co., Mark XI model, movement no. 1’162'085, manufactured in 1948
Movement: cal. 89, jewelled, engraved with Broad Arrow, anti-magnetic cover, signed
Dial: Broad Arrow and encircled T, signed
Case: screw back with engraved broad arrow and military markings 6B/346 and 1538/48, 36 mm. diam., signed
With: IWC Certification of Genuineness dated 8 June 2010, Repair Report dated 18 October 2010, later presentation box
Special Notice

On lots marked with an + in the catalogue, VAT will be charged at 7.7% on both the premium as well as the hammer price.

Condition Report

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Lot Essay

Consigned by a private collector and fresh to the market the present Royal Air Force Mark XI is distinguished by its excellent overall condition.

Manufacture of the Mark XI, one of the most legendary navigator's watches, was launched in 1948, year of production of the present watch. The iconic model was always fitted with IWC's famous hand-wound calibre 89, with or without the hacking feature, and cased in stainless steel, some early versions in chrome-plated brass. The Mark XI is renowned for its timekeeping accuracy, a fundamental specification required by the British Armed Forces. As a result, the watches were regulated in five positions and tested in temperatures ranging from -5 degrees to 46 degrees over a 44 day testing period.

The Mark XI was issued to the B.O.A.C. (British Overseas Airline Company), the Royal Air Force and Commonwealth forces, including South Africa, New Zealand and Australia. The engraved numbers on the back differ depending on service. Dials and military markings also vary but those for military use show a broad arrow, some also the Ministry of Defence specification for Tritium, the encircled T.

The original dial of the Mark XI models featured radium and were replaced in the 1960s by IWC with the less radioactive and consequently safer Tritium version.

The present watch is engraved with Mark XI reference number 6B/346, the "6B" signifying "Flying", the combination of "6B/346" was the watch specification. Number 1538 is the serial number and 48 the year of production.

This model is illustrated in Ore d'Oro 2, by Jader Barracca, Giampiero Negretti, Franco Nencini, p. 207

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