I found this at a school? It measures 25.13 mm and weighs 6 grams.
There are no back marks that I can see. Is it more of a modern button?
How old is it?
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Hi Karen; It is an Early 19th Century button from 1820 - 1830. You can tell this by the fact that it has a 1Peice design with a shank on the reverse. These buttons were out of style by 1840. Yours has a Constellation Pattern and valued at about $5 ok. Happy Hunting. PEAE:RONB