Shilling; Siege of Pontefract by Oliver Cromwell; octagonal emergency coin. Front: inscription under crown within inscription. Reverse: castle with three towers; on the upper tower a flag between letters P and C; right of castle inscription; left barrel of cannon inside inscription; Pontefract; Charles I (King of England); anonymous; 1648; silver (metal); striking (metalworking); h 2.8 cm x w 2.8 cm x w 3.62 gr