1821年英国珀金斯、费尔曼和希思1英镑。正反测试钞。 钢板雕刻。 "提交给联合王国银行家的防止伪造钞票计划的铁版印刷样本。" PMG 认证。 GREAT BRITAIN. Perkins, Fairman & Heath. 1 Pound, ND (ca. 1821). P-Unlisted. Front & Back Test Notes. PMG Certified. Steel plate engraving. "Siderographic specimen of the plan for the preventing the forgery of bank notes submitted to the bankers of the United Kingdom." PMG Certified.