Thats 1250? Seriously? I thought it was later or so. Guess schynbalds have an earlier date, but maybe only nobles could afford them, surely by 1300 normal people could afford them. I do know they had early coat of plates back in the 1250s but they were typically not overlapping and were worn under the maille due to the gaps. No surviving examples I think made it though and we'll never know how common they were.