6A/372 - A.S.I. Air Speed Indicator Mk.IVC (40-240 MPH)(Cat No AVG 68) 6A/372 - A.S.I. Air Speed Indicator Mk.IVC (40-240 MPH)(Cat No AVG 68)
Range 40 - 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 to 1920s military aircraft and was in use up to the mid 1930s, in aircraft such as the Hawker Hart and Audax, the Bristol Gamecock, Bulldog and many other types. Marked A.M. with crown on rear and 1518/13, suggesting a possible manufacture originally in 1913. Converted to a capsule movement in the late 20s, 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. 3220. Extremely rare. £1,950. Catalogue no. AVG 68