Watch List notes:

Commonwealth (1649-60), Halfcrown, 14.90g, 1651, m.m. sun, shield of England within palm and laurel wreath, rev. conjoined shields of England and Ireland, mark of value above, no central stop (ESC 18 {425A} [R2]; N.2722; S.3215), about very fine, dark toning.
Provenance:
Baldwin auction 14, 13-14 October 1997, lot 423 (illustrated), £440 - "very fine, the variety very rare for this date"
Blackfriars Bridge Hoard, deposited c.1660
Estimate: £600.00 - £700.00