RAF Height and Air Speed Computer Mk I

This is fare scarcer than the more commonly found Ican flight computer. This example is in excellent original condition and marked 6B/108 with a serial number dating it to 1940. It also carries AM and King's Crown stamps and manufactured by the London Name Plate Mfg Co. Ltd of London and Brighton. A similar example is shown in Prodger's RAF Flight Equipment book page 113 but ours is the earlier Mk I version. Diameter 6" (15 cm)