Watch List notes:

Commonwealth (1649-60), trial strike of the 1651 Halfcrown, on a thin 1mm. copper flan, 7.52g, 33.6mm., m.m. sun, by Blondeau, shield of England within palm and laurel wreath, rev. coin alignment, conjoined shields of England and Ireland, mark of value above, edge plain, (ESC 64 {444A} [R7], this coin; N.-; S.-), some weakness on obverse between 1 and 3 o'clock and on corresponding area of reverse, otherwise extremely fine, the only recorded example.
Provenance:
D S Freedman, Spink auction 55, 8 October 1986, lot 85, £1,000
R C Lockett, second portion, Glendining, 11-17 October 1956, lot 2607, £40
H Montagu, second portion, Sotheby, 19 November 1896, lot 712
E Hawkins, Sotheby, 31 July 1868, lot 29, £2
Estimate: £4,000.00 - £5,000.00