The couple to whom this belonged were married in Amsterdam in 1944 and subsequently lived in Lausanne, Switzerland then Tehran, Iran, before retiring in Bartlesville, Oklahoma, in the early 1970's. They travelled extensively and bought well. They also inherited some very nice things.
(He was the son of a Dutch diplomat, she was the daughter of a German baron.)
If additional images will help, I will gladly provide them. I certainly appreciate the thoughtful comments coming out of this discussion.
Best regards,
John