Four circled hallmarks of paulownia patterns are carved on the left, right, top and bottom of a Keicho Oban coin and a circled hallmark of paulownia patterns, a pattern of paulownia in a hexagon, and a kao are carved on its back, and the shape of a coin is angular ellipse.
表面は上下左右に丸枠桐紋極印がそれぞれ一箇所、計四箇所打たれ、裏面中央に丸枠桐紋、亀甲桐紋、花押の極印が打たれ、形状は角ばった楕円形である。