Watch List notes:

(g) Elizabeth II (1952-), Proof Two-Pounds, 1989, '500th Anniversary of the Sovereign', by Sindall, Queen seated in King Edward's chair, rev. Tudor Rose, edge milled, 16.02g, 12h (Spink SD3 [4262]), brilliant uncirculated, or very near so.
Provenance
From the Quinn Collection
'Purchased Whitcombe Street (London), 25 January 1992 - £295
, ,
NGC PF70 ULTRA CAMEO (Certification #5879377-013)
, https://www.ngccoin.com/certlookup/5879377-013/70/
Estimate: £600 - £800