It’s a 2447 “yachting” model which were a special order from what I could find. The blue on the right subdial is marked in 5 minute increments which they used when starting sailboat races.
It’s been on a shelf for 30 years, I’m having it serviced and a new crystal installed but I know nothing about watches. It seems the yachting face was pretty rare the appraiser I took it too said he didn’t know because he couldn’t find any that had sold. I’d like to insure it but I’m striking out on