Butter Pat Dishes

My mother gave me an old cardboard box full of dishes, among them I found 12 of these butter dishes. They measure 2 7/8" x 2 7/8" and have gold edging. Because the patterns are so exact on each of them, I am guessing that they are not hand painted. The design on each side is a green vine with a 3 leaf clover in the center. There is no stamp or symbol on the underside. Can anyone tell me anything about these dishes? Thanks!!