Coins, Numismatic Books, Tokens and Historical Medals

Commonwealth (1649-1660), Halfcrown, 1658, mm. sun on obv. only, a contemporary forgery in [?] base silver, 12.30g/11h (ESC –; N –; S –). Fair to fine, unrecorded £150-200

A combination of date and mintmark not found on the genuine coinage. Was the forger unaware of the change of mark, or did he perhaps have more urgent problems on his mind?