countermark

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More research on the paper used in Ricordi's scores is necessary to discover whether crescent countermarks are present on sheets with the eagle/"GFA" combination, or whether perhaps the eagle and crescent bifolia combinations as illustrated in figure 2 might also contain the letters "GFA" on the bottom half sheets.
The reverse of the coin is largely obliterated, partly by extended wear and/or a weak strike and partly by flattening due to the impact of the relatively large countermark that was applied to the obverse.
The provenance of the countermark is likewise uncertain, but again a Greek origin is assumed.
Explanations of methods and analyses, such as flan-preparation, style, die-comparison, analysis of overstrikings, countermarks and hoard evidence are provided.