Charles I 1648 Pontefract Shilling, posthumous issue in name of Charles II

Charles I (1625-49), silver octagonal siege Shilling, issued from the Royalist stronghold of Pontefract Castle, dated 1648 (old style), Posthumous Issue in name of Charles II, issued after execution of Charles I, 30^th January 1648/49 (old style/new style dating), crowned C R, inner linear circle with legend and outer beaded circle surrounding both sides, DVM: SPIRO: SPERO, rev. view of Pontefract castle gateway with portcullis raised, flag flying on central turret, P to left, C to right for Pontefract Castle, OBS reading upwards to left an abbreviation of obsidional meaning the issue is produced under siege, CAROLVS: SECVNDVS: 1648, the N retrograde, weight 4.49g (Nelson type I for name of Charles II cf.fig.47; N.2648; S.3150). Toned a little double struck on right side of crown on obverse, consequently a little weakly struck at top both sides and on high points of castle gateway, otherwise a well centred strike, some very light tooling around some of the obverse beads and rim on right and left side, otherwise good very fine, reverse a little weaker due to strike, a rare and very short lived issue with a good provenance.