Thanks for the suggestions Richard, I'll have a read of those.
With regards to the submarine, I'm more than happy to take some pictures if you let me know where to send them (can't see a way to add them in the comments unless I'm missing something?)
I'd also recommend a read of the research David Boettcher has done on these almost forgotten watches.
Great article thank you, I'd like to add two more watches for anyone interested in this subject.
A.T.P. or army trade pattern watches, introduced in 1939 they saw service through the war, and set much of the template for the later dirty dozen watches.
The other is the 1915 Brook & Son SUBMARINE, although not issued by the admiralty they made at the request of a couple of WW1 submarine commanders for use at sea. It was years ahead of it's time being one of the earliest water-resistant and anti-magnetic wristwatches.
On a side note, can the Oracle team or any of the readers point me towards a historical record for the Cartier Santos Dumont story?
I've recently been trying to research the subject but the earliest account of the story I've been able to find in the archives only dates to 1978 when Cartier was launching what we now know as the Santos.
How British Military Watches Changed History
How British Military Watches Changed History