Vickers Vanguard and Merchantman

Vickers. A turboprop airliner.

Seats: Mixed 92, Tourist 139
Range: 3,100 km
Cruise: 640 km/h
Payload: 17,000 kg
Take off run: 1,800 m
Fuel burn: 2,223 kg per block hour
Reference price: $1,500,000 in 1976 dollars
Enters service: 1960-01-01
Production ends: 1963-12-01
Confidence: estimated (to be verified)

Source: Specifications from the type article on en.wikipedia.org as read in era4-aircraft.md; price, fuel burn, crew and maintenance cost per hour are estimates.