D.aron cup silver 800 wtb

Can someone help understand what are these cups are
What is their value ?

They appear to be gifts to a father from Willy, his son. One mentions “birthday” (geburtstag). They are German 800 standard silver and were made by Wilhelm Binder, who was working in the town of Schwäbisch Gmünd. I have no idea of their value.

Phil

Thank you very much … my name is willy after his name he was my grandfather father … im trying to find some details on that time … thank you again