Frederick Post 11″ Mannheim Slide Rule 1452P WWII Era, With Case / Box ca 1942

Vintage Frederick Post Mannheim-type slide rule (1452P), approximately 11″ in length, dating from circa 1942 (WWII era “Made in USA” production period). Comes with original case / box and instruction sheet (“How to Operate the Mannheim Type Slide Rule”). A great piece for collectors of scientific instruments or historical calculators. Some minor wear to outer box. No chips or cracks noted to slide rule and cursor is intact. See pictures for further details on condition.