Thanks for all the replies. I think you guys are right; probably just a well-loved card with the gold worn off.
Still curious though. A lot of the green borders have a bit of yellow/gold in them (take the Griffith or the Wheat in
this auction). Is this like a base layer beneath the green or is it a partially applied layer of gold on top? Would that make the layer order yellow-->green--->gold? Or is it just green-->gold?