Skelly Oil operated three Lockheed twins:
c/n (construction number) 1240: Lockheed 12A.
History: First flight 1937; operated by MClanahan Oil with registration NC18946. To Le Tourneau Co in 1941 (registration changed?) then to Royal Canadian Air Force in July 1941. Operated by Maritime Central Airways 1944 with registration CF-BXS. Returned to USA 1945 and operated by H G Chatteron trading s Dayton Airways with registration NC18946. Operated by Skelly Oil with registration N18946. To Tetyak Construction in 1961 then John Pace. Crashed on take off from Martrinsville, Virginia in 1963
c/n 18-2226 C-60A (Army Air Force designation for Lockheed 18)
History: First flight 1942; Converted to civilian use and registered NC66682 in 1946. To Skelly Oil, later reregistered N66682. To Tulsa University, Coral Drilling, Dee Howard (1968; Dee Howard was a major modifier of Lockheed twins), Jonnell Leasing (1968), Joyeria Walters S.A. and registered TI-ARD in March 1974. Stored at Panama City Airport from at least October 1973 with “Pan America Freeport” tiles. Derelict on fire dump by September 1976. Removed the TI (Costa Rica) register in 1976.
c/n 237-5371 PV-1 Ventura (US Navy)
History: delivered to US Navy as 33363 in Canada. Delivered to Royal Canadian Air Force as 2211 in 1943. To Howard Aero Services with registration N75381 in 1955. To Champlin Petroleum and reregistered N5C by 1959. Converted to Super Ventura and operated by Champion Oil & Refining about 1961. To Skelly Oil and registered N175SS, to B B Saxon & Co, to Gen Aero, to Sparlinco Corp, to Frank Armstrong, to Pioneer Ventures. Crashed near Chimichagua, Colombia on 15 April 1973 on an illegal flight.
Source: *The Lockheed Twins *by Air Britain