A few comments have said these are too easy. Well, have a go at this one. This just happens to be mine and the age is not known.
Guesses in the comment section.
What is it #1 is still unsolved.
Constitution Watch- Some good news
- H. R. 4091
- Contributing to the cause
- Demanding Moms ‘go postal’ on Rand Paul amendment to USPS bill
- Surgeon General nominee’s vow to refrain from anti-gun agenda likely big fat lie
- U.S. Postal Service Announces Giant Ammo Purchase
- MO 2nd Amnd Preservation Act decried by man who wants Constitution ‘superseded’
- Texas open carry group seeks spotlight on harassment of veterans and gun owners
- Even compliance with Connecticut ‘assault weapon’ ban not enough for gun-haters
- ‘Mom’s’ group has fit over rumored Post Office CCW amendment
- Project “Gunwalker”
- An error has occurred; the feed is probably down. Try again later.
- Sipsey Street Irregulars
- Sunday Jams - Dire Straits
- I'm spiking the guns here on Sipsey Street Irregulars
- Bad Ass of the Week - Jean Thurel
- The Tueller Drill and the 21 Foot Rule
- Sunday Jams - Ram Jam
- Well...you kind of asked for it Chris
- Good reads
- Not in my name: A Georgia III% group manages to conjure up every single negative stereotype of the Patriot movement
- Some good land navigation info
- That's all I have to say about that
What is it? 
It looks like a fitting for an assembly of tubes or pipes. It doesn’t appear to be precisely machined, so I’m guessing it isn’t aircraft or nautical in nature. It may also be a mount for something that needs to be able to move in multiple directions, perhaps a gyroscope.
Camera or microphone related?
Not so easy on the surface.
Hint: Tina…..think of a “lab” many years ago.
Hint:
Cowboy….Not a gyroscope, but reacts as a gyroscope.
Although totally unmodified, I have adapted (not modified) this for use in my ammunition reloading sequence.
Does it hold test tubes?
It’s for a centrifuge.
Correct……the rotor for a hand cranked centrifuge.