A laminated mahogany two-blade propeller, the boss stamped "90 h.p. Rolls-Royce Martinsyde, DRG L3680, D2390, P1650, L15206", one blade bearing the Martinsyde Coat of Arms transfer and lettered in a panel "Martinsyde Protype RG Fighter 1916. Found at Woking June 1966. ORIGINAL FINISH" -- 91in.diam.