WWII RAF Height and Air Speed Computer Mk. II. Battle of Britain era Spitfire
RAF Height and Air Speed Computer Mk. II - This is fare scarcer than the more commonly found Ican flight computer. This example is in excellent original condition and marked 6B/131 with a serial number dating it to 1939. It also carries AM and King's Crown stamps and manufactured by the Henry Hughes & Sons London. Diameter 6" (15cm). Obviously heralds from the Battle of Britain era.
Used by aircrew to help with navigation and to calculate Height and speed. This item would usually be found in the cockpit contained in a pouch attached to the fuselage in aircraft such as the Spitfire and Hurricane. The last photo shows the Computer mounted on the right hand side of a MK II Spitfire