Watch List notes:

The Uvedale Collection | AU58 | George III (1760-1820), 'Spade' Guinea, 1788, fifth laureate head, edge obliquely milled, 8.43g, 12h (Farey 1270; EGC 715; MCE 392; Spink 3729), lightly wiped with faint flecking on obverse and other scattered superficial marks, otherwise residually lustrous, almost extremely fine, in NGC holder, graded AU58 (Cert. #6135269-013).
Purchased April 1997
,
https://www.ngccoin.com/certlookup/6135269-013/58/
Estimate: £500 - £600