Back in the mid 70's, was stationed at keesler AFB in Biloxi Mississippi(Biloxi=a$$hole of the world, Keesler was 5 miles up it).
Took my Barracuda to the strip to run it, see what it would do. Got there nice and early so i could let it cool down, ANd put the slicks that came WITH the car on it. Well, with over an hour before the gates to the pits opened, I got bored, and having never had the back seat out, or, for that matter, being able to figure out HOW to get it out, exploring I went.
Found the hidden screws(had to put the foldable seat back at about 45 degrees) took out the screws, and removed the lower part of the rear seat.
Found a couple of screw drivers, some coins, some carb jets, nothing much. Lifted up the carpet where it is cut around the sides of the seat, on the driver's side, nothing, but on the passenger's side, a ring, engagement kinda ring. Picked it up, firgured it was a fake, and took it to my rear side window, nice scratch it made. now $$$ flash in my eyes.
Well, a couple of days later, took it to a local jewelry shop to see if it was real, and it was. They said it was an old European style cut, and was about 3/4 carat.
Being the honest idiot I am, i tried to find the guy i bought the car from, to see if he had lost anything in the car, but couldn't find him. Had the ring appraised, came in @ $1500 value. Well, I had engine problems, had to do a rebuild, and needed cash, sooo, sold the ring for $900, not bad as I had only paid $600 for the car(1965 Barracuda, built 273, 4 spd, 9" for rear W 4.11s) ran 12.2 1/4's.
I ALWAY remove the seats now when I pick up a used car.
FF