..... Boeing delivered the first 707-based VC-137 Air Force One to the White House in 1962 .....
"707-153 (VC-137A) - Three jet transports were bought by the U.S.A.F. 'off the shelf' as standard commercial aircraft instead of being built to a military specification as was customary. Only minor changes to the electrical system and a rearrangement of the interior were incorporated. A special communications station was located forward, ahead of an 8-seat passenger compartment. The centre cabin was arranged as an airborne headquarters, with conference table, swivel chairs, motion-picture projection equipment, and divans convertible to beds. The aft compartment contains 14 reclining passenger seats. Three galleys ant two dressing rooms are provided. The first VC-137A flew on April 7, 1959 and all were assigned to Andrew Air Force Base near Washington, D.C., for the use of VIPs. All were redesignated VC-137B following installation of JT3D-3 fan engines.
C/Ns: 17925/17927
U.S.A.F. Serial Numbers: 58-6970/6972 "
Quoted from: "Boeing Aircraft Since 1916" by Peter M. Bowers (pp. 361-362) - Putnam - London - 1966

58-6970 was displayed at Le Bourget during the 1959 Paris Salon and the public was admitted to visit it.
I had such an opportunity .....