The Standard calls for the color of the eyes of a RIR to be "Redish Bay". Anything other than that would be incorrect. I have not heard of the birds with Amber eyes. Let me caution you first that there are people out there that say lots of things about the "Mohawk" line of RIR that have no idea what they are talking about. There are also people using that name as a selling point when the birds they have are not in fact from the Reese line.