WWII U.S. Navy AN/APM-3 Portable Test Set Manual – Confidential – Western Electric

Offered here is an original U.S. Navy Preliminary Instruction Book for the AN/APM-3 Portable Test Set (Models 1–200), manufactured by Western Electric Co., Inc. This manual is marked “Confidential” and was issued under U.S. Navy contract, making it a desirable piece of WWII-era military electronics documentation.

The AN/APM-3 was a portable diagnostic unit used for testing and servicing radar and electronic systems in aircraft and ground installations. Manuals of this type were essential for maintaining early radar, communications, and signal equipment during WWII and into the early Cold War period.

Details:

• Equipment: AN/APM-3 Portable Test Set
• Type: Preliminary Instruction Book
• Manufacturer: Western Electric Co., Inc.
• U.S. Navy Contract Marked
• Classification: Confidential
• Serial Number: 85

Historical Significance:
This manual relates directly to early military electronics and radar support systems. Equipment in the AN/APM series was used by Army and Navy technicians to diagnose and maintain complex electronic systems, making this an excellent addition to any collection focused on WWII aviation, radar, or Signal Corps technology.

Condition:

• Complete and intact
• Normal age-related wear and toning
• Light creasing consistent with use
• No major damage observed

Please review photos for full condition details.

Collector Appeal:

• Original WWII-era military documentation
• “Confidential” marked issue
• Western Electric manufacturer
• Strong crossover appeal to radar, aviation, and electronics collectors