Hi
A clear side on picture of the foot against a darker background would show the outline profile of the foot.
A clear picture of the base of the foot would show whether it is a trumpet foot or a closed foot with a pontil mark on the base.
A clear picture of the pontil mark if there is one, would be helpful (if it isn't a trumpet foot).
I think it is possible these date to mid 19th century and that the green glass might be uranium glass.
They might be French,
or they might be from Schachtenbach glas
or they could be Josephinenhutte
m