Al Worden’s aluminum flight computer with sliding dial, labeled “Computer, Air Navigation, Dead Reckoning, Type MB-4,” measuring 4.75 x 11.25, with one side used for wind triangle calculations using a rotating scale and a sliding panel, and the other a circular version of a slide rule. Extra marks and windows facilitate calculations specifically needed in aviation. Includes its original brown vinyl sheath. In fine condition.
From the collection of Apollo 15 CMP Al Worden, and accompanied by a letter of provenance from his daughter Alison (Worden) Penczak.
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