Mspence wrote:
> Looks like a lead disc and the reverse had a drop of lead on it with hole thru it to attach the thread I assume?
Mspence, you asked me (in another post) to take a look, and comment. It is definitely a button, a type which was manufactured from the late-1700s through early-1800s.
There are two possibilities:
The holes in the "drop of lead" on its back held a brass or copper or iron wire loop, which pulled out, causing your button to be lost from its owner's coat. Or, if the hole goes all the way through the "lead drop," it was made as a crude form of thread-loop.