Watch List notes:

The Hardcastle Collection | PROOF 63 ~ [Top Pop] | British East India Company, Madras Presidency, Proof 10-Cash, 1808, 'Heavy Issue', in gilt copper, Soho, Arms of the East India Company, date below, rev. Persian legend, X. CASH in exergue, 6.78g, 6h (Stevens 5.132; Pridmore 204), choice, about brilliant uncirculated, extremely rare, in NGC holder, graded PF63 (Cert. #5878623-016) [*Single Finest*].
https://www.ngccoin.com/certlookup/5878623-016/63/
Estimate: £400 - £600