At the end of February 1942 the NEI Government ordered new national insignia to be used on the Dutch aircraft. From 28 February and on the Dutch flag had to be applied on al Dutch aircraft.
Due to the losses just about five CW-21Bs were left. It is uncertain whether these had the flag applied.

Scheme Colour name FS number BS number Humbrol XtraColor Vallejo Model Color Vallejo Model Air
Standard #2 Upper surfaces Jongblad (medium Green) ~4092   149 X114 70.895 ? 71.034
Oudblad (Olive Drab)     66 X112/X113 70.885 71.014
Undersides Aluminium dope ~7178   191 X216 70.864 71.062
Camouflage scheme of the Curtiss CW-21B Interceptor RNEIAF
Camouflage scheme of the Curtiss CW-21B Interceptor of RNEIAF with orange triangles applied as national markings.
Camouflage scheme of the Curtiss CW-21B Interceptor RNEIAF
Camouflage scheme of the Curtiss CW-21B Interceptor of RNEIAF with flags applied as national markings.