An overview of colour schemes in the WW2 era: Me-109 in the back wear the early markings with large serial and roundels. When war was eminent the aircraft received smaller serial, red rudder and a red fuselage band in April 1940, as seen on the C-3603. As American pilots often did not recognize Swiss over German aircraft the 'Neutralitätsanstrich'(neutrality colours) were introduced in September 1944 with red and white stripes and a white cowling. The D-3801 and Bu-181 sport these colours.

Swiss-built version of the MS.406 series built by EKW at Emmen. The type flew on second line duties until 1954.

The Morane-Saulnier MS.412, produced only in Switzerland as the D-3801, was an uprated version of France's workmanlike MS.406 fighter.