T-45 Lip Microphone + Switch SW-141 with push-to-talk button SW-141-V with leather cord.
On the front of the microphone date of manufacture 1944. Face strap made of plastic.
The T-45 microphone can be used with most American radios like BC-1000, BC-1306, GRC-9, also used by tank crew and pilots, they were used in noisy environments.
All microphones and push buttons show different signs of use and aging and the markings may vary, not being the same as the photograph.