Vintage Sperry Gyroscope “Microwave Transmission Design Data” Engineering Manual – Publication No. 23-80 – WWII Era

Original Sperry Gyroscope Company engineering reference manual titled “Microwave Transmission Design Data” (Publication No. 23-80). This hardbound technical manual was produced for engineers working on microwave transmission and radar systems during the WWII/postwar period. The front cover bears the original “CONFIDENTIAL” marking, and the included declassification notice states the publication was later declared Unclassified by authority of the War and Navy Departments and the U.S. Patent Office.

Also included is the original declassification notice showing receipt by Bell Laboratories, Department 1650, January 11, 1946, adding excellent historical provenance and appeal to collectors of military electronics, radar development, Bell Labs, and Cold War-era technical publications.

Features:

• Original Sperry Gyroscope Company publication
• Title: Microwave Transmission Design Data
• Publication No. 23-80
• Original burgundy hardbound cover
• Original “CONFIDENTIAL” cover marking
• Includes original declassification notice
• Bell Laboratories received stamp dated January 11, 1946
• Excellent reference for radar, microwave engineering, and military technology collectors
• Good vintage condition with normal shelf and edge wear

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