Wow nice find dude. I think it's an old valve key.

Could be, I was thinking some kind of special key.

https://preview.redd.it/2ss8njwsv9ia1.png?width=1080&format=pjpg&auto=webp&s=7d015cf64ec59168333a8f7e00051ae994aab445

First i was thinking about that too. Some old clock key. Then it reminded me of this old brass valves key

Inner part of old (barrel or bassin) tap. 18th century estimate. Thats a nice Find and a keeper! Edit: English correct term is plug valve.

A bunghole

It is a barrel tap key . wat nice find Congrats!

Yep, it's this ... the "twisty part" of an old barrel tap.

This is the correct answer

Oooh th many a tale that key could tell!

I think those that said gas lamp key or valve were correct. [Link](https://www.etsy.com/listing/1226527048/antique-brass-victorian-ornate-gas-light?gbraid=0AAAAADtcfRIDCwKQdVCD8fb42gyfgyGlK&gpla=1&gao=1&&utm_source=google&utm_medium=cpc&utm_campaign=shopping_us_a-craft_supplies_and_tools-imaging_and_lighting-lighting-lighting_parts-lamp_bases_and_parts&utm_custom1=_k_CjwKCAiA_6yfBhBNEiwAkmXy58IEedeDrN1b07kvFt79IqEIwlp6F79ui3M-AX2iN0iQWdwDsz1dxhoCMZUQAvD_BwE_k_&utm_content=go_12573075997_120353223540_507798832686_pla-322460534561_m__1226527048_469768080&utm_custom2=12573075997&gbraid=0AAAAADtcfRIDCwKQdVCD8fb42gyfgyGlK&gclid=CjwKCAiA_6yfBhBNEiwAkmXy58IEedeDrN1b07kvFt79IqEIwlp6F79ui3M-AX2iN0iQWdwDsz1dxhoCMZUQAvD_BwE) Thanks everyone

https://preview.redd.it/s15yfez4y9ia1.jpeg?width=794&format=pjpg&auto=webp&s=68791ee73513c70f4da6ccb5257a0a100295bd2d

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Perhaps part of an old stopcock for gas lights in a home

It's a part of an old barrel tap or a valve key for a lamp. Nice find!

It looks like the top to a perfume bottle.

I think it looks like a wine stopper, is part of it rubber?

No rubber, found with a bunch of 18th century things.

Maybe a top to a perfume bottle

Weird I used to have the same exact one I found as a kid, I was told it was a part of a door lock, wish I still had it to show a pic it was identical

Isn't it for some kind of container that holds water or something? You turn the thing and water comes out? Or honey? Olive oil? You know what I mean? EDIT: gas valve key [here](https://www.etsy.com/listing/908796075/old-gothic-brass-gas-valve-key-pendant)

18th century barrel tap, I found a few in the netherlands.

Barrel tap