By the shape and the translucence of the porcelain this seems to be a German set. But the decoration looks Austrian in style. The mark on the bottom of each piece. Is hand painted and under glaze.
Because it is hand painted, it could come from a small. Decorating Studio at the turn. The cups are 4" opening, 6" wide included handles. The saucers are 5 1/2 in diameter. All pieces are in excellent antique condition with no chips, cracks nor hairlines.The gold is also in great condition with little discoloration. Please take a look at my store for more hand painted sets.