代用币。伯明翰黄铜代币,直径21 mm。正面文字"AYLOR & CHALLEN LTD ENGINEERS BIRMINGHAM",背面" MINTING B.I.F. BIRMINGHAM MACHINERY"。Birmingham Brass token, 21mm. Obv: "TAYLOR & CHALLEN LTD ENGINEERS BIRMINGHAM", Rev: "MINTING B.I.F. BIRMINGHAM MACHINERY".PCGS MS-63 Secure Holder.