I have no doubts!
If you will open Killer Elite by Michael Smith on Operation Winter Harvest chapter, you will find description of the Unit's crest. I will quote it here as it is exactly what I want to say about the coin:
"...The Activity's motto was 'Veritas Omnia Vincula Vincit', Latin for "Truth Conquers All Chains", and its crest depicted an eagle grasping a claymore - the traditional broadsword used by the mediaval Scottich highlanders to repel the English invaders - and wrapped in a metal chain. The crest came about because a number of the leading members of the unit, including Jerry King, had Scottich ancestry. The outer frame of the crest was in the form of a leather belt normally worn around a kilt. One of the nine links in the chain was broken as a reminder of the failed Eagle Claw missions. Each of the eight other complete links represented one of the eight men who died at Desert One. The words "Send Me" were inscribed on the blade of the claymore. It was a quotation from the Bible, Isaiah 6:8:"Also I heard the voice of the Lord, saying, 'Whom shall I send, and who will go for us?' Then said I, 'Here am I; send me'..."
It was the first crest. Later the chain was removed from the crest as a symbol of failure - the Units succeed. The spectre of the Eagle Claw disappeared.
There is no chain on the obverse of the coin. But it is on the reverse. Maybe this coin was made for Eagle Claw's Anniversary. But it is only mine supposition.