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.

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🔧 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

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🪖 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.

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📦 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

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🏆 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

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⚠️ 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.