when air force zero began it's private air service, it had a second-handed dc-3 from american airlines for the first flight of the air force in 1950, taking off from barra airport. it operated over 2 dc-3s before the 747 came into market, in which air force zero bought 20 747s.
i would like to credit the users @strasburgrrfan @chessie-2101 @diveboberlover and @migscratch10.