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A Sterile Dial - 6BB-6645 99-5238290 - The Lost Navigator - British RAF Issued Watch***SOLD***

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Rare and highly sought after - a sterile dial 6BB-6645, The ‘Lost’ Navigator /|\ RAF issued watch in stunning condition and freshly serviced and tested by John Senior!

The 'Lost Navi' watches offer an interesting proposition, approximately 2000 pieces were produced of these sterile dial watches, which are of monobloc construction rendering the tonneau-shaped case more water-resistant. After many years of discussion amongst collectors, they are still somewhat of a mystery! These watches are very seldom seen and especially in a fantastic condition like the piece on offer here.

Most attribute the “Lost Navigator” watches to Hamilton as CWC didn’t take over the production of wristwatches for the armed forces until around the ’80s yet Hamilton’s were used up until around the mid 70’s so the “Lost Navi’s” were issued between the terms of both manufacturers.

Only issued in 1976, the dials are sterile or anonymous with no brand name under the usual 12 o’clock position. 

What’s On Offer 

In outstanding condition, it's always a real pleasure to stock and to own military-issued watches in such fine states of preservation as this one.

The dial is original with crisp white Arabic indices and sharp applications, the case is also in unbelievably good condition and as with these styles of case, it wears wonderfully on the wrist.

Inside beats the A.Schilds AS 2160, 17 jewel manual wind, 28,800 BPH movement which was serviced by military specialist watchmaker John Senior recently.  The watch has all the makings of a great issued watch, robust stainless steel case, Arabic indices, sword hands, broad arrow, and outer seconds track which all in all, makes for a really appealing and symmetrical dial that is timeless yet takes inspiration from watches from both World Wars.

Additional information

Made from

Stainless steel

Black dial, Swiss Made 


NATO Style

Technical specifications


Movement Type:
Mechanical hand wound



When New

Power reserve: 50hrs

Purchase details

Condition: Excellent

Model Reference Number: 

Date of issue: 1976

12 months by VWS


36 mm

Lug width:
19 mm

Lug height: (lug to lug)
41 mm

Wrist size: