Original 1948 Advert Alvis Leonides Engine Westland-Sikorsky S.51 Helicopter
£14.99
Headline: Alvis Leonides chosen for the Westland-Sikorsky S.51 Helicopter. Manufacturer: Alvis Limited, Coventry. The Aeroplane magazine, dated March 19, 1948. Publication: The Aeroplane magazine.
