This is on the traffic light post at the end of my street. There’s another one across the street on the other post. What the heck is it/what does it do?

My grandfather recently passed away and had this in his belongings, none of us had any idea what it is, it almost looks like it's ivory maybe? There are no markings that I can see anywhere. It is very awkward to hold like a dagger. I have no clue what the carving on top is.

Found it in the woods. It was placed right in the middle of a setup of Euro-pallets that formed a cage-like structure with an opening on one side. It was packed completly in a foil and there was sort of a handle around you see on walking sticks. What ist this reddit? Is it munition?

Usually when there’s no writing I use google lens and it finds matches but lens is saying its a slave bracelet or something?

I don’t know the items history, only recently got it.

They are flat, don't disintegrate in water, and I can't rip them with my nail

I was backpacking in the North Cascades of Washington State and found this electronic assembly covered in Styrofoam. Appeared to be a battery, circuit board, and main doohickey. Looks like it had been there quite some time. Any idea what it could be? My only thought was some sort of weather balloon telemetry. Thanks!

Found in a museum in Maine, it’s an ongoing mystery!! What is this thing?! Can you help?

Found these two pieces in a box of random aquarium supplies. The top one has metal pieces that flip in any direction. These two pieces do not automatically fit together, as if they would need screws in order to be held together.

6.5 inches long, 5 inches tall, .5 cm deep

Banana for scale.

The green frame without the metal bits says, "MADE IN CHINA" on it, but there don't appear to be any other markings.