I love the Medalist, I have a Medalist I and it's a really nice camera too. People generally don't pay much attention in public to these, I suspect they look much like a DSLR to the uneducated.
For those interested, I've been doing a serial number survey and collecting Medalist serial numbers for the purposes of determining estimated production. If you want to view that information, you can find a link to a spreadsheet in my onedrive here:
https://1drv.ms/x/s!Auyccz5bfV-XiCzr9HD_FXHA-f7V?e=eHVEdd
The OPs camera would be a later 1945 production camera.
I somewhat doubt that the Medalist was developed specifically for the U.S. Navy or by their request. They were used extensively by the Navy during the war, but I think this was more the convenience of purchasing an already developed product off the shelf. There are too many 1940 and 1941 production cameras and the Medalist was already being sold to the public as early as 1941, as seen from a excerpt of a 1941 Kodak trade catalog:
View attachment 312835
There's also an internal Kodak document entitled as
Major Developments in New Apparatus, which show the pre-production prototype of the Medalist as (E-1108)
Six-20 Kodak with Screw-Out Front which dates its development to at least during or prior to 1939.