When is this button from?

[coinman123]

I found this button at a colonial site, and it does not look like any of the other buttons I found there. It appears to be made of pewter, and has a big thick shank. I would like to know when it is from, and other info would help too.

 

[CRUSADER]

Unless it has details on the top, its a late 18th C Civvy button.

 

[coinman123]

Thanks Crusader, that time period fits in with everything else I'm finding.