Oh that is lovely 'Zac! The Air Corps' yellow-and-blue scheme gives you instant retro but the wire-braced tail and jumbo, P-26-style antenna mast really add that early '30s flavour.
As Evan said, it looks the perfect 'missing link' but much more businesslike than the
Swift (the Curtiss-powered XP-31 looked 'perky', your P-40A is more no-nonsense). Very nice