CUBA. Cuba - Mexico. Peso, ND (1872-77). PCGS AU-53. KM-R6. Countermark: Variety B, Long and thin key. Applied to the obverse of a 1866-Mo Mexico Empire of Maximilian Peso (KM-388.1). An <strong>EXTREMELY RARE</strong> host for this series with few recorded examples. The countermark is deeply impressed, though slightly uneven, on a moderately worn and wholesome looking host. Signs of circulation and handling are limited, with much of the originality retained. Compare this example to an 1867-Mo 8 Mexican Peso with a Cuban Key countermark graded VF Details that sold for $4,600 in our January 2023 New York Sale as lot 21364.