At OCTU in '72, we were issued berets with a one-piece enamel/metal/cloth officer hatbadge, backed by a white disc as Occifer cadets. The badge was fixed to beret via 3 metal tabs on the back allowing the white disc to be removed. Beret went missing yonks ago, but I have the badge. I can't ever remember seeing an Officer wear a beret in those days. I first remember seeing the one-piece tape rank badges about '75.