Print; Piles with note by Alan Willmott, 17/11/2010, "All films from various sources, non BTF" / Square metal canister inside white cardboard box / I69 / "Master" / BTF written and 1969 on leader / "Wind tunnel test on APT" / Approx. 440 feet on 800 feet reel / Printed leader: BTF (R&R) J4007 R39, 09/05/1968 / Colour, silent / Close-up shots of wooden model in wind tunnel, movement of middle piece, other model with threads in various places, movement of threads with wind; Cardboard case