Boeing 377 Stratocruiser

Boeing. A piston airliner.

Seats
Mixed 64, Dense 84
Range
5,800 km
Cruise
480 km/h
Payload
10,000 kg
Take off run
1,900 m
Fuel burn
1,250 kg per block hour
Reference price
$1,250,000 in 1947 dollars
Enters service
1949-04-01
Confidence
estimated (to be verified)

Source: Entered service 1 April 1949 with Pan Am; MTOW 67,132 kg; up to 100 seats plus 14 in the lower lounge; Pan Am's launch order was 24.5 million dollars for 20 aircraft; BOAC flew 377s on the Atlantic by the end of 1949 (Wikipedia, Boeing 377 Stratocruiser, https://en.wikipedia.org/wiki/Boeing_377_Stratocruiser).