Watch List notes:

Mint Errors Mis-Strikes (2) Halfcrown 1963 struck with an incorrect collar, thin rim with some evidence of the beading struck on the rim A/UNC, slabbed and graded CGS 75 (UIN 30040), Halfcrown 1964 struck without a collar UNC and lustrous with a pleasant gold tone, slabbed and graded CGS 78 (UIN W1281)

Estimate: 50-100 GBP