Stromberg-Carlson Sound Powered "Deck Talker" Radio Headset/Chestset - H200/U

Description

We are The Supply Sergeant, in Cheyenne, WY.
In business since 1958, we have a huge amount of military surplus and other unique items that we will be making available here on eBay.
Keep an eye out for our other listings!
US Navy Stromberg-Carlson H200/U Sound Powered Headset/Chestset...These are in mint condition, showing almost no signs of use. The sets are untested, however, given their amazing condition we are sure they are fully functional.
From the introduction in the H200/U manual:
"
Sound-powered telephones are just what the name implies.
They are telephones powered by the sound pressure of your voice
rather than batteries or an electrical power source.
If  your
phones work properly, speaking in a strong, clear voice generates
enough current to carry your voice to all other phones on the
circuit."