I think it looks like half a latch of some sort, with the flat end of the scooped out center being the working surface. Maybe a gate latch where this piece sits in the ground.

This is the SMPS-600 from Jensen, of course. It's a "Digital Audio Speaker with Surface Fusion Technology". Which is to say it's a magnetic speaker coil with a thin high density foam disc where the cone of a regular speaker would attach. This disc is affixed directly to the voice coil and when you place it on a hard surface, the surface behaves like a speaker cone. A tabletop, a windshield, Flint's forehead, etc. It's really amazing the amount of sound you get from this device. It has lots of cool features, a microSD slot, FM tuner, AUX input, rechargeable battery, etc. I use the little patch of velcro on the top to store the remote control when I'm not using the device. The suction cup mount is removable letting you place the speaker directly on a horizontal surface, or use the suction cup mount and place it on a window, or the lid of your cooler at the beach, etc. It's a ton of fun, and I'm not the only one who thinks so. :)

This is a picture of the bottom of a five gallon glass carboy after having racked a batch spiced cider. The beige stuff is yeast and yeast lees, the dark brown stuff that looks like forest duff is the spice mix I added, cinnamon, cloves, orange and lemon peel, etc,. The orange ring not in focus around the border of the picture is the vinyl coated carboy wrangler ring/handle I use to haul this heavy load around.

I wound up making applejack from the cider and it's delicious!

Now for a new puzzle. What is this?

The long lever is about four feet long, the middle arm is about a foot long and the end has a very fine edge to it and it's slightly curved, like a spoon. Both levers move. The base looks like it was made from 5/8ths rebar.

Thats the biggest bottle opener I have ever seen. ;)

Bead breakers.

an old pry bar to break a tire bead away from the rim,
i.e., to pull the tube out for patching. ?

A manual mole smasher

I think it's a bead breaker too. I thought of that last night, and find two confirming posts here this morning. I would imagine the rebar triangle base would be driven over... no. The tire would be off the vehicle and lying flat on the ground with the axis pointing straight upward and the tread touching the vertical post. Then the breaker bar with the spoonish tool tip would be adjusted to the most vertical position possible/necessary and placed on the sidewall of the tire nearest the rim as close to the bead as possible. Then the operator would be able to lean downward on the long lever and exert a great deal of force concentrated near the bead....

That makes sense. Now I just need to drag it up to the nearest antique dealer. Thanks guys.

Quite correct.

This suggests the existence of something I need:

The Automatic Mole Smasher.

I was taking it apart in my head to try to make a peavey out of it. Nice find.

Some kind of sea creature that hides in the sand? An anemone of some sort?

(I just wanted to say, with friends who sandbag like that, who needs anemones? I'll be here all week. Try the Fish of the Barnyard.)

I've seen "nests" like that where fish lay eggs, but then the fish is usually hovering around, protecting the nest.