WW II US MILITARY SWITCHBOX BC-366 &MC-385-C
Offered here is a 100% original WWII U.S. Army Signal Corps Jack Box BC-366, complete with its original cardboard box and original instruction sheet.
This is a genuine wartime communication component, used in US Army armored vehicles (including the M4 Sherman tank) as well as in USAAF aircraft.
⸻
🔧 Item Details:
•Model: Jack Box BC-366
•U.S. Signal Corps issue
•Manufacturer: Automatic Radio Mfg. Co., Inc.
•Contract / Order: Order No. 12099 WF-43 (1943)
•Original functions selector:
•COMP
•LIAISON
•COMMAND
•INTER
•CALL
•Volume control: “Increase Output”
•Connections for:
•MIC
•PHONE
⸻
🪖 Historical Use:
This type of jack box was used in:
•✅ M4 Sherman tanks
•✅ Other US armored vehicles and tank destroyers
•✅ Halftracks and command vehicles
•✅ USAAF aircraft (bombers, transports, etc.)
•✅ Signal Corps communication systems
It was part of the crew intercom and radio communication system, allowing crew members to communicate internally and externally.
⸻
📦 Condition:
•Excellent original condition
•Complete with:
•Original wartime box
•Original instruction sheet
•No postwar repaint
•No modifications
•Very nice, honest patina
•Perfect for:
•Museum display
•Vehicle restoration
•High-end collection
⸻
🏆 Why this one is special:
•Complete boxed set (very hard to find)
•Aviation and armored vehicle related
•Correct WWII dated example
•Perfect for a Sherman tank display or restoration project
•Also ideal for USAAF aircraft or Signal Corps collections
⸻
⚠️ 100% original WWII item – not a reproduction.
A rare opportunity to acquire a complete, display-ready WWII Signal Corps communication component suitable for both US armored vehicles and aircraft.