Archibald said:The Ms-406 started in 1935 and thus was the only "modern" fighter in 1938, when the French armies started to rearm. The VG-33 and D-520 came much later; although much more modern they were three years late.
The D-520-01 flew in November 1938 and was barely ready in May 1940. One squadron used it.
The VG-33 flew even later, in spring 1939. 160 of them were on the production line, only a handful - 12 ? - were readied for fight early june.
In some way the MS-406 was to the D-520/ VG-33 what the Hurricane was to the Spitfire.
Ready much earlier hence larger numbers when WWII, but growth potential close to zero. (outdated structure).
The Curtiss H-75, too, was available in large numbers around spring 1938, hence french massive buyouts to the USA.