The medal and cross of Lorraine are both vintage french and have the french silver hallmark. The hallmark indicates a silver content of at least 800 or 80% silver. The Cross of Lorraine has a little bit of gold overlay on the tiny cross.
The chain is oxidized sterling silver and measures approximately 20 inches in length.
The round medal measures about 1 inch in length including its loop (but not the attach ring/bail).
The cross measures about 1 1/8" in length including its loop, but not the attach ring.