I sent them by registered mail (insured), so i think there is nothing to worry about. If you need the registeration number to ask at the post office, i can send it to you.
This dish was given to my grandmother "She was the wife of the Egyptian Embassador" after WWII as a gift from The Mayer of Zurich celebrating a 100 years Aniversary. The Dish has a serial number (3565) and is made of silver. The 5 Schillings Silver coin is placed as the bottom of the silver dish She then gave it to me as my wedding gift, Thanks Grandma