Watch List notes:

NGC PF66 | George VI (1937-1952), 'Coronation' Proof Halfcrown, 1937, bare head left, rev. arms, milled edge, 11h (ESC 787; Bull 4035; Spink 4080), lightly speckled surfaces with red toning, otherwise with brilliant fields, as struck, in NGC holder, graded PF66 (Cert. 5880390-006).
Provenance
Gemini, Spink 'Stratos' Sale, 15 September 2020, lot 289 [part]
Estimate: $140 - $200