Quite an unusual watch, thanks for sharing. If you have a copy of Longines' response, I would be curious to know more.
Hi DD12,
This is the reply I got from Longines:
Thank you for your message and the information provided.
Further to your request, we are pleased to provide the information contained in Longines' handwritten registers.
The original serial number 5'749'799 identifies a wristwatch in stainless steel bearing the reference 4201 and order number 20337. It is fitted with a Longines manually wound mechanical movement, caliber 12.68Z and was invoiced on 30 September 1939 to the company Mitterer, which was at that time our agent for Austria.
We trust that we have responded satisfactorily to your request and remain at your entire disposal for any additional information.
Best regards,
Jennifer Bochud
Brand Heritage
I then asked if they had records of the dial and if it was a dial with lume, and got this reply:
Thank you for your message and sorry for the delay of replying.
We can confirm radium must be on the dial. However, we can't attest this is the right configuration as our archives are not accurate.
We trust that we have responded satisfactorily to your request and remain at your entire disposal for any additional information.
Best regards,
Jennifer Bochud
Brand Heritage