Watch List notes:

(g) AU58 | Portugal, Michael I (1828-34), Gold Peça of 4-Escudos [7,500 Reis], 1830, Lisbon (Gomes 16.02; Fb. 138; KM 397), lustrous with traces of toning, a pleasing extremely fine, a recorded mintage of 2,294 pieces, in NGC holder, graded AU58 (Cert. #5879414-002) [Tied 1 of 5 / 21 Finer].
https://www.ngccoin.com/certlookup/5879414-002/58/
Estimate: £1,500 - £2,000