The first Czechoslovakian post-war aircraft Sokol M1C was manufactured by the Automobile Works in Chocna (earlier the Engineer J. Mráz Company). Production of this three-place sport and training airplane with a Walter Minor motor began in 1946.

The wings are wooden construction, with a veneer leading edge back to the first spar, then fabric. The landing gear doors are partly steel, partly wood and covered in fabric. The wooden frame of the fuselage is covered in veneer. The cabin has standard side-by-side seating; behind is a space for luggage or a third seat.

Controls are dual yokes, joined by a lever mechanism. The central instrument panel contains a compass, altimeter, variometer, turn-and-skid indicator, airspeed indicator and clock. The left side has a tachometer, air temperature indicator and oil pressure gauge. The landing gear is retractable, the 380/150 wheels are equipped with brakes. The motor is horizontally positioned, attached to four elastic mounts on the firewall. Fuel is carried in wing tanks.

The aircraft carried out numerous demonstration flights in the late 1940's and early 1950s.

Technical parameters:
Motor: Walter Minor 4-III, 105 horsepower
Wingspan: 10 meters
Length: 7.35 meters
Wing surface area: 13.8 square meters
Empty weight: 410 kg
Maximum speed: 240 km/hour
Service ceiling: 5000 meters
Range: 1000 km
Fuel burn: 11.5 liters / 100 km