Air Navigation Computer MB-4A, Dead Reckoning, with Dietzgen Divider Regia Aeronautica it is in exceptional condition

it is in exceptional condition for its age

operates in the same manner but has smaller air volume capacity for smaller aircraft with fewer air-driven instruments

made by Minneapolis-Honeywell

but it is fully intact

dated November 1962 with updates as of April 1966

Air Navigation Computer MB-4A, Dead Reckoning, with Dietzgen Divider Regia Aeronautica it is in exceptional conditionHere is an Air Navigation Computer as used by US Air Force navigators from 1940 ~1980 for dead reckoning navigation. This one appears to be from the 1950's. Included with the computer is a 14 inch Plotter Type PLU 1 C, and a Dietzgen Divider in an aluminum tube, for measuring and repeating distances on a map. Computer measures ~5. 5 inches wide and ~12 inches long in its case.