Two companies supplied the British MoD (Ministry of Defence) with watches for the Mark 11 specification which came out in 1948

Feb 08, 2019,20:51 PM


The Mark 11 specification is shown below.  It details the timing requirements and the dial design and waterproofness among other aspects of the watch the MoD wanted built.

Mark 11 watches are given the MoD designation of 6B/346 wherein 6B is the code for the Royal Air Force (RAF) and 346 is the code specific to the watch for this specification (and is not a serial number).

While the Mark 11 watches from JLC and IWC each fulfilled the specification to win the contract, each watch had its own history.

The JLC Mark 11 was only in production for a relatively short time--from 1948 to 1953 with around only 2,950 total watches built in several batches.  Further, the JLC watch was supplied to the RAF and then later to the Royal Australian Air Force (RAAF) in 1953.  These RAAF examples are more rare than the RAF watches.  Unlike the IWC, no civilian version of the JLC Mark 11 was ever made.  The JLCs were all destined for the armed forces.

The Australian watches had some differences from the British.

The RAAF dials lacked the Broadarrow (the mark of MoD property) and they featured a "flat 3" compared to the "rounded 3" of the RAF dial.  The RAAF watches also had G.6B/346 or G6B/346 engraved on the case back.  The hands were a little longer than their British counterparts and were always of the "Square Hour" type.  The serial number on the movements were engraved on the base plate of the cal. 488/SBr rather than on the top bridge.  Finally, the RAAF watch had spring bars rather than fixed bars.

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My RAAF with flat crystal....

 By: DSF : February 8th, 2019-21:50
saying hi to his brother. Best, David ...  

Beautiful example David! [nt]

 By: reintitan - Mr. Roboto : February 8th, 2019-22:24
No message body

Thanks reintitan = )

 By: DSF : February 9th, 2019-13:53
Yours is really handsome looking. Especially with the bubble crystal, which gives the mark 11 an entirely different charter. More true to the original and the curvature makes it more “organic” Best, David

Thanks David

 By: reintitan - Mr. Roboto : February 14th, 2019-01:00
Domed factory replacement crystals can still be had along with other OEM parts. PM me if you want a source.

Same here! Nice one! [nt]

 By: amanico : February 8th, 2019-23:59

Very nice! [nt]

 By: blomman Mr Blue : February 9th, 2019-14:47

Here is mine, RAAF.

 By: amanico : February 9th, 2019-00:07
My beloved one. ...  

One of the best examples out there.

 By: reintitan - Mr. Roboto : February 9th, 2019-10:43
The original brush finish on the case is intact.

superb looking Nico 👍

 By: DSF : February 9th, 2019-13:59
Best, David

Merci, David. [nt]

 By: amanico : February 9th, 2019-16:18

You really should get the IWC...! [nt]

 By: blomman Mr Blue : February 9th, 2019-14:47

My first real passion

 By: winther502 : February 9th, 2019-01:56
Just wunderfull watches I really, really like Yours Jacob / Copenhagen ...  

Not counting Smiths DeLuxe 6B? [nt]

 By: HansL : February 13th, 2019-22:49

Omega CK2777 Trio...=)

 By: HansL : February 14th, 2019-00:11

this one?

 By: HansL : February 14th, 2019-11:42
[URL=][/URL] not mine as it belongs to my friend but I have handled same model before, it is just way too big... ...  

Yes, my GRAIL. [nt]

 By: amanico : February 14th, 2019-11:53

Thin Arrow, TA Bienne dial?, and Fat Arrow [nt]

 By: reintitan - Mr. Roboto : February 14th, 2019-00:48

Good eye sight...=) [nt]

 By: HansL : February 14th, 2019-11:45

Do you have the entire extant examples of the Smiths DeLuxe 6B???

 By: reintitan - Mr. Roboto : February 14th, 2019-00:47
Wow. Those watches are rare as rocking horse poo.

Excellent examples Jacob. [nt]

 By: reintitan - Mr. Roboto : February 9th, 2019-10:43

Love the pair Jacob

 By: DSF : February 9th, 2019-14:03
= )

Great pair! :) [nt]

 By: blomman Mr Blue : February 9th, 2019-14:46

Such a great watch!

 By: blomman Mr Blue : February 9th, 2019-11:55
My pair says hello! Best Blomman ...  

Beautiful duo [nt]

 By: DSF : February 9th, 2019-14:05

Thank you! [nt]

 By: blomman Mr Blue : February 9th, 2019-14:46

Told you long time ago... ;) [nt]

 By: blomman Mr Blue : February 10th, 2019-01:30

True, true... ;) [nt]

 By: amanico : February 10th, 2019-01:31

Really clean and mint condition

 By: reintitan - Mr. Roboto : February 9th, 2019-21:33
Awesome Mr. Blue

Thank you, Mr Illuminati! [nt]

 By: blomman Mr Blue : February 10th, 2019-01:31

echo with White 12

 By: HansL : February 13th, 2019-09:20

White 12 JLC and IWC!

 By: reintitan - Mr. Roboto : February 13th, 2019-11:53
The original and most rare version of the dials! Superb!

Superb pair! :) [nt]

 By: blomman Mr Blue : February 14th, 2019-10:41