Douglas DC-6

Douglas. A piston airliner.

Seats: Mixed 52, Coach 68
Range: 4,400 km
Cruise: 480 km/h
Payload: 9,500 kg
Take off run: 1,500 m
Fuel burn: 780 kg per block hour
Reference price: $900,000 in 1947 dollars
Enters service: 1946-11-24
Confidence: estimated (to be verified)

Source: First airline deliveries 24 November 1946; MTOW 44,100 kg; 48 to 68 seats; new price 210,000 to 230,000 pounds in 1946 to 1947 (Wikipedia, Douglas DC-6, https://en.wikipedia.org/wiki/Douglas_DC-6). Cruise speed and costs are estimates.