It was DC-3, popularly known as Dakota, manufactured by Douglas Aircraft Company of USA. Powered by two 1,200 hp propeller engines, it had a cruising speed of 300 kilometers per hour and had accommodation for 28 passengers, with a flight crew of 2. It was introduced on commercial routes in 1936 and its first domestic flight in the USA took 13 hours, 4 minutes – a record at the time. Since then 10,655 Dakotas were built and sold to dozens of countries. No other passenger aircraft has proved to be so successful.
Douglas DC-3 (Wikipedia)
Douglas Aircraft Company (Wikipedia)