Watch List notes:

MS62 | Commonwealth (1649-1660), Double-Crown or Half-Unite, 1651, • THE COMMMONWEALTH OF ENGLAND • [sic], English shield within palm and laurel wreath, rev. • 1651 • GOD • WITH • VS, conjoined shields of England and Ireland, 4.56g [70.2grns], 4h, m.m. sun (HCN 297; Manville & Gaspar, 1991, pp. 137; Vaughan-Morgan 150 = Lockett 4245 = Schneider II, 350 same dies; EGC 37 [R5]; North 2717; Spink 3210), traces of doubling to strike, otherwise a magnificent example of the fabled 3M's error COMMMONWEALTH reading, choice, much as struck and excessively rare, the finest of the three specimens known, and in the cataloguer's humble opinion, seriously undergraded, in NGC 'Horace Hird' holder, graded MS62 (Cert. #6135299-031).
Provenance
A Lost Parcel from the Celebrated Horace Hird Collection
Spink, 5 April 1955 - £32.10.0
Estimate: £6000 - £10000