What I believe we have here is a novelty item, representing the WWI Iron Cross 2nd class (Due to having the attachment for a ribbon that is broken). This cross would be about 3 inches or so in size. Popular with bikers and surfers in the 60's/70's. Original ones on the front would have a crown on the top, the letter W in the middle, 1914 date on the bottom. The back would have a crown on the top with the letters FW under the crown, oak leaves in the middle, 1813 date on bottom.
The Iron Cross 1st Class would be a pin back, and have only manufacture markings and stamps on the rear.
WWII Iron Crosses 2nd class have on the front a Swastika in the middle, 1939 date on the bottom, The back would have the 1813 date on the bottom. The 1st class would be a pin back and not have the date on the back.
Mike
USAF Retired