Watch List notes:

(x) NGC PF64 | George III, Bank of Ireland, Proof 6-Shillings, 1804, in silver, by C.H. Küchler, Soho, laureate, draped and cuirassed bust right, rev. BANK OF IRELAND TOKEN, Britannia resting against Irish harp, 1804 | SIX SHILLINGS below, edge plain, 11h (KM TN1; DF 616; Spink 6615), some scattered spotting and uneven patination in otherwise brilliant fields, the peripheries handsomely accentuated by reddish-orange flare, good extremely fine, very rare, a delightful example, in NGC holder, graded PF64 (Cert. #3827997-017).
Provenance
Heritage, NYINC Signature, 8-9 January 2017, lot 30973 [unsold]
Goldberg's 91, 7 June 2016, lot 3013 - $2,800
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https://www.ngccoin.com/certlookup/3827997-017/64/
Estimate: £2000 - £2500