✅ SOLVED Looks like an old car part.

[WVExplorer]

Not sure what this is. I have found some spark plugs and other older car parts in the river I’m detecting in. Assuming copper but could be brass. The top piece screws off and it looks like air can be added. The bottom has a hole in it and the inside appears to have a white glass inner chamber.

 

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[Charlie P. (NY)]

I think that's a very early condensor for a tractor. Alice Chalmers by the color. The little nut is an electric terminal.

Here's as close to an image as I could find.

 

[WVExplorer]

I think that's a very early condensor for a tractor. Alice Chalmers by the color. The little nut is an electric terminal.

Here's as close to an image as I could find.

View attachment 1834903

Thanks Charlie. Had me stumped. Good ID.

 

[50bmg]

looks like a air/steam vent valve to me
Maid-O\'-Mist® - Automatic Air Valves - Jacobus Steam Vents - Float Control Valves - Saddle Valves - Illinois

 

[EQ8]

I think 50bmg is correct.

 

[Charlie P. (NY)]

You're right. I enlarged the image and it is a cap rather than a nut on the fitting. I thunked wrong.

 

[xr7ator]

I'll cut you some slack, Charlie. I've seen more of your posts and know that most of the time you're thunking right!