The SNB (Czechoslovak Security Service) used the K-65 aircraft. Those were entirely painted grey excluding their engine hoods, horizontal stabilizers with elevators, landing gears and wings struts painted dark red. Red white-bordered registration code and white-bordered national markings were typical. This was introduced shortly after establishing of round 3-segmented Czechoslovak national marking in the beginning of twenties, having different shape (3-segmented but shaped as rounded triangle) and used also after WWII and in today Czech Republic as well, for the aviation subordinated to the Ministry of Home Affairs (police, government VIP-flight etc.), not to the Ministry of National Defence.
Czechoslovakia | Other