These figures, again from Garrison Miniatures, are listed as PE 12, Phrygian armoured infantry, with creast. Sounds more like a Star Trek race of aliens; however, I looked up Phrygia, which was an area in the centre of modern Turkey and these chaps seemingly were seconded into the Persian army once the area had been conquered.
They are lovely figures, with crisp detail and were a delight to restore: