There's no shortage of weird items in the world, things whose purpose isn't immediately apparent. When faced with one of these items, we have two choices: live in ignorance, or post it on r/whatisthisthing to get a conclusive answer.
Since ignorance is boring, it should go without saying that we're going with the latter option. What are these things? The answers will soon become apparent.
Brand names make things way easier to identify, and this thing was ID'd pretty quickly. It's a Victorian pencil pendant — essentially an ancestor of today's mechanical pencils.
This thing is simply an incense case. Most incense holders are more simple, but ones like this have a built-in rollcage of sorts.
Once upon a time, toothbrush handles were flat, not curved. This is simply an old-school toothbrush holder.
Despite OP's doubts, this thing is, in fact, a belt buckle. It's either an original or a replica of the ones worn by the Union Army during the Civil War.
I don't have any experience with identifying bullets, but this thing immediately looked like a fired bullet to me. Turns out, surprise surprise, it's a fired bullet.
This is kind of cutlery, but also kind of not. If you've ever worked with clay, you'll probably recognize these as clay modeling utensils.
The fact that this was seen at the DNC offers a hint as to what it is. It's simply a badge that identifies the person's rank and position. In this case, his position would be "president."
This one seems incredibly complex and possibly ancient, but it turns out it's just a bougie new-school set of salad servers.
This thing is designed to clip into a baby's stroller. It attaches to a blanket, and keeps the blanket from being kicked around. Kind of weird, and redundant, that it says 'baby.'
This is a kit for training dogs. The aluminum and leather objects serve as targets in dog competitions.
It might look like a doorstop, but its intended place is actually on the wall, not on the floor. It's a wall-mounted match holder, dating back to the times when people needed matches to light their stoves and heaters.
I really wanted this to be a meteorite of some kind, but it's actually a marcasite nodule. What's a marcasite nodule, you might ask? It's a type of crystal structure.
These things are designed to reach out-of-the-way latches to activate them. Sometimes they're used for windows. This one was most likely used to pull the hatch of an attic loft open.
This is clearly part of a Tony Hawk's Pro Skater level. If you don't believe my explanation, an alternative explanation — that it's a bollard to limit car access — is equally plausible.
This is an automatic card shuffler. It isn't an automated card shuffler, since this requires a hand to crank it, but it's still more automatic than doing it the old-school way.
You know how bees swarm when they're looking for a new place to nest? The Reddit hive mind concluded that this box is for beekeepers to catch bee swarms.
Depending on where you went to school, this thing may be immediately identifiable to you. It's a communal sink. Step on the bar at the bottom and water will come out.
If it fell from the sky, it could only come from an airplane (or a spacecraft, I suppose). This is the inspection cover hole from an airplane. As for why it's no longer covering an inspection hole, we have no answers.
It looks like it has to do with radio signals, and it does. It appears to be an SDR antenna for picking up a wide range of radio frequencies.
Here's an example of something that most people have seen, but likely not in this form factor. The big item is a Seeburg jukebox from the 1950s, while the smaller, teardrop-shaped thing to the right is a wall-mounted speaker.
