Active on its last civil commercial contract, supporting firefighting operations for the Alaska Bureau of Land Management, operated by Duncan Aviation. Taken on strength by the RAF as XP447 "Horatius" a new Argosy C.1 in 1963 and served until 1975 after T.2 conversion in 1974. Became N1430Z with Management Jets International in 1976. Joined Duncan Aviation in 1978, withdrawn in 1991. Donated to the Museum of Flying at Santa Monica, CA. Transferred in 1993 to the Milestones of Flight Air Museum at Fox Field, Lancaster, CA. Museum closed in 2015.

Ex XP447. Built as an Argosy C.1 and converted to a T.2 in 1974, still wearing the name 'Horatious' given when operating with 215 Squadron. Registered N1430Z in 1976 with Management Jets International to operate a contract for the Alaska Bureau of Land Management. Withdrawn from use in 1991 and displayed, initially at the Museum of Flying in Santa Monica and later the Milestones of Flight Museum at Lancaster, Fox Field CA. That museum closed in 2015 but the Argosy remains stored there at time of upload.

K25 slide scan. Owner Duncan Aviation. Delivered as XP447 to RAF March 1963. Converted to T2 November 1974. Sold to Duncan Aviation for BLM contract work in Alaska, remained active until about 1991. Flown to Lincoln, NE after end of contract. Later donated to Museum of Flying, Santa Monica, CA. By 2013 at Milestones of Flight Museum, Lancaster, CA which closed down in 2015.

Part of the museum's collection since 1992/1993.