Its characteristics look to be: 

• early type, without slats;
• with radio;
• painted green with light blue undersurfaces ( probably not uniform; on other MiG-3s, it looks that both colors on the metal parts are lighter than on the wooden ones); 
• on the rudder, we see a digit 2 and a small red star, painted perhaps with a lighter shade of red than the main stars;
• light (blue?) pitot probe with silver end;
• black outlined red stars on fuselage and wings undersurfaces (it is not cnown if the red stars on uppersurfaces, an early factory standard, were deleted or not);
• silver propeller blades with partially black painted rear surface (as standard); the black paint is worn;
• a metallic stripe covers the spinner-cowling junction;
• there are metal sheet triangles near the oil coolers outlet flaps, as on late type MiG-3s.