芜湖六分螺丝头试样票, 无齿, 由费拉尔设计, 棕色印于粗布纹纸上, 带四边边纸, 上边纸较宽, 罕见品, 保存良好.1996年11月周炜良.Wuhu 1894 First Issue Proofs and Essays 6c. imperforate screwhead essay by de Villard in brown on stout wove paper, with top margin and margins all round. Fine and attractive. Believed to be unique. Photo