Douglas DC-6B

Douglas. A piston airliner.

Seats: Mixed 66, Tourist 84
Range: 4,800 km
Cruise: 500 km/h
Payload: 11,000 kg
Take off run: 1,700 m
Fuel burn: 850 kg per block hour
Reference price: $950,000 in 1947 dollars
Enters service: 1951-04-01
Confidence: estimated (to be verified)

Source: MTOW 49,000 kg and 42 to 89 seats (Wikipedia, Douglas DC-6). Pan Am used DC-6Bs for the first tourist class flights on 1 May 1952. The April 1951 introduction date is an estimate. Price follows the sterling figures in the same article, converted and deflated to 1947 dollars.