Hi! I bought these at an estate sale and am wondering if they are worth anything? They are a set of 6. With Greek like design around the edge of the cup and saucer plate. I’m unsure if it’s real sterling silver because I see no markings on the bottoms or anywhere of the cup or plate. A cleaned them up but still a fair bit of tarnishing on them. Very ornate!

Set of 6. Saucer plate is about 4 inches wide. Cup is almost 1 1/2 inches tall by about 2 1/2 wide.