Watch List notes:

The Hardcastle Collection | PROOF 62 BROWN | British East India Company, Madras Presidency Proof 20-Cash, 1808, 'Light Issue', in copper, Soho, Arms of the East India Company, date below, rev. Persian legend, XX. CASH in exergue, 9.36g, 6h (Stevens 5.122; Pridmore 198; KM 321), attractive chocolate tone with glints of lustre apparent, good extremely fine, scarce, in NGC holder, graded PF62 BN (Cert. #5878623-017) [Tied 1 of 2 / 18 Finer].
https://www.ngccoin.com/certlookup/5878623-017/62/
Estimate: £150 - £250