US Embassy Defense Attache Office Finland This is an authentic 1.75″ challenge coin that was done for the hard working warriors who staff the Defense Attache Office. They are stationed in the US Embassy abroad in Helsinki, Finland. If you are a challenge coin collector or if you know someone who is then you know that this is a rare, desirable, authentic challenge coin. This will make a great gift for someone you know or yourself! These are the folks that are at the tip of the spear in our Global War on Terror. These coins are real and not cheap fakes like those being sold by some sellers who will mislead you just to make a buck and line their own pocket. If you have questions feel free to ask.