Even more fascinating is the following: Nutting was a prisoner at Stalag Luft III, the camp from which 76 men (Nutting not included) famously attempted to flee just a year later, and he apparently needed the Oyster chronograph in order to time certain aspects of his comrades' escape. In the early 1960s Nutting also worked as a consultant on The Great Escape, a movie based on the attempt.
Transcript follows. Many thanks to Maxwell for the tip.

Transcript
MONTRES ROLEX S. A.
18, RUE DU MARCHÉ
GENÈVE
TÉLÉGR.:ROLEX GENÈVE - TÉLÉPH. 5 03 36
Rappeler réf. HW/MC
GENÈVE, le 30th of March 1943
Cpl. C.J. Nutting
Gef.Nr. 738
Stalag Luft 3
Dear Sir,
We beg to acknowledge receipt of your order dated 10th March 43, and in accordance with your instructions we will supply you with 1 Chronograph Oyster No 122. This watch costs to-day in Switzerland Frs. 250,- but you must not even think of settlement during the war.
As we have now a large number of orders in hand for officers, there will be some unavoidable delay in the execution of your order, but we will do the best we can for you.
Meanwhile, believe us to be
Yours truly,
Montres ROLEX S. A.
Director
(Signed, 'H.Wilsdorf')