ROLLS ROYCE 'Kestrel' and 'Buzzard' aero engines instruction book, May 1932; Siddeley 'Puma' 240 B.H.P aircraft engine instruction book; Liberty 12 cylinder aero engine handbook, 3rd edition December 1918; and B.R. 2 Aero Engine handbook, 2nd edition May 1919 (4)
Sold for £190