Three (3) Unique Antique Glass Ball Swirlback Buttons - 7/16"

Three (3) Matching Antique Glass Ball Swirlback Buttons - 7/16" - These are set in what I describe as a lateral set-up - What I find unusual is half the buttons have intense red/pink glass swirls and the other half is Amber Glass Swirls - You do not see many of these set-ups and the colors are normally throughout the button - Mid 1800's - I imagine it is just how the hot glass cooled, but it is neat looking