Watch List notes:

George III (1760-1820), oval countermark upon Spanish Eight Reales of King Charles IIII (1788-1808), 1794 FM, struck in Mexico City, Mexico, small oval hallmark of George III right at centre of obverse, bust of Spanish King laureate and draped right, date below, legend and toothed border surrounding, CAROLVS.IIII. DEI. GRATIA, rev. crowned quartered shield of arms, pillar with ribbon incuse motto either side PLUS VLTRA, legend surrounding, .HISPAN. ET IND. REX. M. 8R. F.M., mint letter with o above, weight 27.00g (Bull 1852; ESC 129; C&R 1069; S.3765A). Attractively toned, coin and countermark good extremely fine, seldom seen this well preserved.

Provenance:
Ex Spink Coin Auction 113, 5th March 1996, lot 65.
The initials F and M at the end of the reverse legend represent the names of the Mint Assayers who were Francisco Arance Cobos and Mariano Rodriguez.