6A/372 - A.S.I. Air Speed Indicator Mk.IVC (20-240 MPH)(Cat No AVG 75) 6A/372 - A.S.I. Air Speed Indicator Mk.IVC (20-240 MPH)(Cat No AVG 75)
Range 20 - 240 MPH, this is the large size ASI, as fitted to 1st WW aircraft, but allows for an increased speed range. It was designed to be fitted to1920s military aircraft and was in use to the mid 1930s, in such aircraft as the Hawker Audax and Hart, the Bristol Gamecock, Bulldog and many other types. Converted to a capsule movement in period, they are much more reliable that the rubber diaphragm type of the 1st WW era. This instrument has now been completely dismantled and fully reconditioned, but will require check calibrating before use, which we can do. Serial No. 824. Extremely rare. £1,950. Catalogue no. AVG 75