Help identifying buttons...

[Mr. Magoo]

Found five flat buttons with four having no identifying fronts and a small one with gold plate or gilt on front. backmarks are hard to read but bottom right has word "GILT" . These were found on a field where a 1758 home stands in NC. Any help appreciated as I know this is a stretch.

 

[BuckleBoy]

I think the most we can say is that they are Flat buttons, c.1820-50 (give or take).