I found a gold ring in a vent behind the rear mirror in my car.

It’s been really cold and I had heated the car before driving. As I was making a sharp turn some water dripped from behind the rear mirror. I guess it was condensation that had frozen and then heated? I stopped the car and used my phone flashlight to see where the water came from. Then I saw a flash of gold from something behind a vent that could be removed behind the rear mirror, where there’s wires for the radar and stuff. It was an 18k gold ring, engraved from the early sixties. I’ve had the car for a year and the former owner was a company with many people using the car. I guess someone his the ring and then forgot about it?