Gott Mit Uns Iron Cross Necklace

WWI Gott Mit Uns 1914/16 iron cross enamel sweetheart necklace. It is in good condition overall. There is some discoloration around the word 'Gott' and, to a lesser extent, near the date. There is a blue spot on the back. The chain shows wear and discoloration. It is unmarked and I am unsure of the metal content.The charm is about 1' tall and the chain is 16' long.