Despite the large demand for the V-tailed Model 35, there were many potential buyers who considered this tail unit to be something of a gimmick, one that might present problems. To meet the needs of such people, Beech introduced the Model 33 Debonair, following a first flight on 14 September 1959. Having a conventional tail unit, and with a slightly lower-powered engine, the Debonair accommodated a pilot and three passengers. It represented a lower-cost version of the Bonanza, and was built and marketed in parallel Until production of the Debonair, as such, ended in 1966, by when almost 1,200 had been built. It was replaced in 1967 by the Model E33 Bonanza, a four/five-seat version that was virtually identical to the V-tail Model 35, except for the provision of a conventional tail unit with sweptback vertical surfaces. This version, in F33A standard and F33C aero-batic/utility versions, remained available in late 1989, by which time production of Model 33 Debonairs/Bonanzas was approaching a total of 3,000. Examples of these aircraft have been used for civil or military training by organisations that include the air force of Iran, Lufthansa, the Mexican navy, the Netherlands government, Pacific Southwest Airlines, and the Spanish air ministry/air force.