WWII Portable Test Set AN/APM-3A maintenance handbook

WWII Portable Test Set AN/APM-3A maintenance handbook, approved June 28, 1944. Original Southland Comm Nav Electronics Inc. technical manual covering service and upkeep for the AN/APM-3A portable test set. Binder-kept period manual with strong collector appeal for WWII aviation electronics, radar, and military communications reference collections.