Reference
IWC Mark XI
Reference 6B · Stainless Steel
The lowest current ask for the IWC Mark XI (ref. 6B) is $5,900 at Bulang And Sons, among 11 live listings we track. The auction record is $7,500 (Christie's Online, 2017). Updated July 4, 2026. View lowest ask →
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About this reference
The IWC Mark XI 6B/346 was produced from 1948 until the early 1980s, primarily serving as a navigation timepiece for the British Royal Air Force. Collectors value this reference for its chronometer-grade Calibre 89 manual-wind movement, which features a hacking seconds function and a soft-iron inner cage for magnetic resistance. The 36mm stainless steel case houses a matte black dial characterized by a white outer minute track and the "Broad Arrow" military mark. Early versions featured radium luminous material, later replaced by tritium, denoted by a circled "T" on the dial. On the secondary market, these watches typically trade between $7,000 and $12,000 depending on provenance and military markings. A notable variant is the "White 12" dial, an early production run featuring a luminous numeral at the twelve o'clock position instead of the standard triangle, which commands a significant premium at auction.
Auction track record
2 documented sales since 2015. Top hammer $7,500 at Christie's Online in 2017. Median hammer: $6,250.
Ranks #42 of 46 IWC auction lots we track — see all IWC records.
Live inventory matching this reference
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IWC Portofino Blue soleil dial box and paper set" Khanjar "r
Ref. W-3188 · Stainless Steel
¥790,370
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*Unpolished* 1990s IWC Mark XII (Ref. 3241)
Ref. 3241 · Stainless Steel
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1943 IWC Portuguese (Ref. 325) Cal. 74 "Starry Night" Dial W
Ref. 1943 · Stainless Steel
¥7,258,500
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IWC Pilot Fliegerchronograph Keramik IW3705-03
Ref. IW3705 · Stainless Steel
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IWC Portuguese IW503203
Ref. 10-21-IWC-3R62HT · Stainless Steel
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Ref. 40970111 · Stainless Steel
¥3,217,935
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IWC Portuguese Perpetual Calendar IW3442-02
Ref. IW3442 · Stainless Steel
¥3,064,700
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1980s IWC Ingenieur SL 18K YG (Ref. 9230) Black "Graph Paper
Ref. 9230 · Stainless Steel
¥2,903,400
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IWC Ingenieur SL ref. 9227 Linen Khanjar Dial from Original
Ref. 9227 · 18k Yellow Gold
¥2,621,125
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IWC Skeleton Watch - Gay Freres Detachable Bracelet | REF. 2
Ref. 2701 · 18k Yellow Gold
¥2,572,735
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IWC Yacht club II Jumbo Automatic Black dial ref 3212
Ref. 3212 · Stainless Steel
¥2,564,670
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Perpetual Calendar | Da Vinci Ref. 9252 | Rose Gold
Ref. 9252 · 18k Rose Gold
¥2,500,150
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IWC Portuguese Perpetual Calendar 42 IW344203
Ref. 10-10-IWC-DU0KFN · Stainless Steel
¥2,500,150
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All documented hammer prices
For this reference (and close variants).
| Lot | Year | Hammer | Venue |
|---|---|---|---|
| 6B/346 · Mark XI | 2017 | $7,500 | Christie's Online |
| 6B/346 · Mark XI | 2015 | $6,250 | Phillips Geneva |
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