Hello, after much searching I have not found out what this pin is. It was my Great-Grandfather's who served in the 25th Armored Engineer Corps (C Company) during the Second World War. This one pin I have no idea what it is and have searched many places and have found no answer.
I was told by a friend's father that is is Greek in origin. Can anyone confirm this? I have copies of his records, and from my memory he did not serve in the Balkans. I'll look for those records again and see if they say differently.
I'll try to get some better pictures of the back tomorrow.