British manufacturer Gaunt US Great Seal pocket buttons

[JohnK83882]

These are unusually domed and might be a feature of the Gaunt made great seal buttons

 

[JohnK83882]

I found these Birmingham buttons with the same slightly more domed design.

 

[JohnK83882]

I found some more pocket buttons with the same domed front and more squat shank. Blankbacks, no maker marks, but based on the above and others I've seen, are probably UK make.

 

 

 

[JohnK83882]

Here's a made in England US Army hat button with the same domed style.