This is a LOT 2 Sony X-3684-121-1 Lever Assembly Tension Regulators. These pieces were ordered directly from SONY is 1991, haven't been used, and have been siting in storage ever since. I've uploaded a video & several photos of these 2 Sony X-3684-121-1 Lever Assembly Tension Regulators to show off their condition, as well as what's included.
eBay