is this civil war

[rryals]

looks like it goes on top of a flap pole. a friend said he saw one just like it in a civil war book. if it is that old what would it be worth if anything?

 

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[rock]

Sometimes it is easier just to google it and then hit the pic button and look for a match on it. Quite fast results when you get the hang of it. HH, rock

 

[Indian Steve]

It looks like half of a antique car radiator cap motometer. It would have had a round thermometer in the middle that you could see while driving.