Watch List notes:

(x) NGC MS62 | George III (1760-1820), Emergency Issues (1797-1799), Oval-Countermark Dollar (8-Reales), 1794-FM, Mexico City, laureate and draped bust of Charles IIII right, oval countermark of George III in centre, rev. crowned square-topped shield dividing pillars, security edge, 12h (Bull 1852; ESC 129; Spink 3765A), bright and lustrous, a magnificent survivor of this emergency coinage, extremely fine, very rare in this state of preservation, in NGC holder, graded MS62 (Cert. #2800184-008).
Provenance
Dr Patrick H C Tan, CNG Triton XX, 10 January 2017, lot 1599 - $1,400
CNG 99, 13 May 2015, lot 1253 - uncirculated - $2,000
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https://www.ngccoin.com/certlookup/2800184-008/62/
Estimate: £800 - £1200