It does not look like it was ever used. Mint shape.

The "Nady 151 VR/HT" refers to a Nady 151 VR Wireless Video System that includes a 151 VR receiver and an HT-3 handheld transmitter. This VHF wireless system is designed for camcorders and video production to provide clear, high-quality audio by wirelessly transmitting sound from the handheld microphone to a camera. The system includes a receiver that can be mounted on a camera or worn as a bodypack, with features like headphone monitoring, and operates up to 250 feet away