Do not unscrew the lid on the tiny metal vial.

I repeat: DO NOT unscrew the lid on the tiny metal vial!!

Lucky for us,r/whatisthisthingis here to tell us exactly what we’re looking at.

Person holding an old, weathered metal tag with the inscription "A1440" next to a computer keyboard

Three small glass ampules are arranged parallel on a dark surface

Rusty, ornate metal tool with a complex handle and a pronged end, lying on a weathered wooden surface

A circular brass protractor with a central cut-out, inscribed "Thacker, Spink & Co, Calcutta," placed on a wooden surface

A black Sharpie marker and a wooden carpenter's pencil with a metal handle are placed on a wooden surface

Wooden puzzle piece shaped like a guitar next to a ruler for scale. The puzzle has a metal clasp and hinge

A vintage yellow egg cooker with an open lid revealing the cooking tray and electrical cord

A worn, rectangular piece of equipment with holes, bolt cutouts, and patches of dirt lies on the ground surrounded by dirt and grass

A hand is shown holding a metal basket-style small trash picker with a napkin caught in it. There are no people visible in the background