I have a chrome pay phone that I found lying on a railroad right-of-way about 30 years ago. It was made by Automatic Electric, Northlake, Illinois. I found it in St. Louis, but the number on the dial is the 503 area code (Oregon, IIRC).
My family found quite a little treasure trove when we moved into our house in Montreal. The guy was a bit of a pack rat, apparently. Semiprecious stones and other items. Very cool.
I pick up coins from the street, and have found several old ones, including a 1940 dime.
I’ve found both little and big Gray Goose vodka bottles, complete with cork stopprs, which I use for water in the frig. Neat, since I am an alcoholic.
I have a small piece of sea glass that I picked up on a rocky beach near Mycenae. It has a slate green hue when dry, but becomes a rich translucent shade of deep emerald when wet. Considering the spot where it was found, I like to think it could be something more interesting than a shard from a ten year old wine bottle, but I suppose I’ll never know.
I found a 1915 Massachusetts license plate while digging on our property. It has the baked enamel final finish that is pristine except in one place where it was bent and some chipped off. You can read it just fine and most of it doesn’t look a year old.
I found a Wenger Swiss Army knife years ago. It’ a little over an inch wide with lotsa gadgets. It weighs about 5 1/2 ounces, too big for me to carry. But it’s fun to show off.
The day after a windstorm, I found a 5-year diary on my driveway. It was written by a man in the army during WWII. He was stationed in the Aleutians.
He only made about a hundred very short entries, but I think there’s enough information to figure out who he was. If I can accomplish that, I’ll start calling around to see if I can find his relatives.
We have a Christmas-tree ornament that my wife found in the alley behind her school. We suspect it was accidentally left on a tree when it was taken out to the trash.
It’s a little wooden Mexican boy, wearing a sombrero, with a black cloth poncho. It’s cute, in a homespun kind of way. We named him Paco, and call him the “foundling ornament”. He goes on the tree every year.
I once found a little toy beside my car after work. It was a yellow skinned girl riding a skateboard. She attaches to the board with magnets in her feet.
It’s fairly small and looks like Happy Meal material but I don’t recognize the character at all.
While in Peru, we found a mummified baby wrapped in a blanket. All the bones were spread out (grave robbers in the area) and I picked up a rib bone. I couldn’t keep it, so I took the little ear of mummified corn that had been with it and left the bone there.
Well, the most recent interesting find was a lovebird. Yeah, seriously. She landed on me while I was out walking my dog. I didn’t ever manage to find her owner, either, and yes, I did try. I love her. 
I’ve found jewelry, cool feathers, a Target gift card, and all sorts of other things while walking, because I look down as well as around me, unlike a lot of people, apparently. 
At the beach, I’ve found seaglass, coral, the usual shells, and once, the skull of what I believe was a seagull, completely clean and bleached. 
And in the pocket of a (new) suede jacket, I found a note written in Chinese or some Asian language, I’m assuming from someone in the factory. 
(shakes fist) damn you, TroubleAgain, I came in to mention Brian the Budgie, whom I picked up off the side of the road on my way to work. Turned out that not just me, but my whole family, tried and failed to find the owner - the vet said the bird was so young and they’re such poor survivors in the wild, that the owner porbably never bothered trying to find him.
A gold signet ring when I was 11 years old. It was too small to fit anyone else and we couldn’t locate the owner, so I got to keep it. I also have a ‘3 graces’ onyx cameo brooch that my dad found washed up on the beach.
On the same beach, Dad also found a whale’s spinal vertibrae, it was big enough for my brother and I to use as a stool when we were very young. It stayed after we moved and I know of two families who’ve lived in that house since, both of whom “found” it buried in the garden.
Check this out;
A Dr. Venkman action figure.
Ooops missed the edit window;
I actually have many found treasures, I could do this all day, but this one is very close to my heart. I collected them while spending a month at a beach on the Andaman Sea!
In sumer camp as a kid I found a huge fish head bone. It’s in a family storage area.
I’ve also acquired several nice walking sticks.
I once found a rubber mallet, by the side of the road, at the Nashville airport.
On another occasion, I found a Role-playing game supplement, Rifts Undersea, sitting next to a parking garage in downtown Nashville, at 7:30 AM.
I have a little glass vial, filled with sand (from Cape Cod). Why anybody would buy something like this is beyond me.
Do you still have it? You could post a pic and maybe someone can give you a translation.
A Creative Zen mp3 player, pre-loaded with a bunch of foreign-language pop music (Chinese, I think), in a parking lot. No one at all around, and no way to tell who it belonged to, so…it came home with me. Works perfectly, and entertains me at work too!