Button help

[Stef45]

Found this at a old park. Not sure how old it is. I'm guessing it's a trouser button. But I'm sure someone on here will have an idea

 

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[Mud Hut]

It's a plain 4 hole coat button .. Had some very similar on my childhood overcoat back in the early 1950's.

 

[TheCannonballGuy]

That type was very commonly used on the "fly" of pants before zippers were invented, and also on long-john underwear. (And probably other articles of clothing). Because it is a thick cast brass disc rather than inexpensive stamped-sheetbrass, I think it is "probably" from more than a few decades before the civil war. If I recall correctly, the first of the much-cheaper-to-manufacture stamped sheetbrass 4-hole buttons was patented in Britain in the 1830s.