Awesome truck Robert. Good to see you guys recovered this one....and re-united it with the proper body!
There is a Ford Ambulance in Belgium, but that's a F60L....and another here in Holland; I seem to remember it's also an F60L. I think there is at least one or two F30 Ambulances in the UK, one that featured here on MLU before that didn't start life as an ambulance, but got the body transplanted later in life. I agree they are definitely rare......and supurb candidates for a restoration.
regarding the 1941 build.....I had the same impression others had/have that the first cab 13's were built in 1942......but your truck might prove us wrong, however I can't help it to be skeptic. What kind of dash does it have? is the roof a solid one? is there any lettering under the headlights?
Attached is a picture of 2 in postwar Dutch service.
source:
https://nimh-beeldbank.defensie.nl/f...6-29a3f34f29ce
source:
https://nimh-beeldbank.defensie.nl/f...0-7cfa44f7c258