De nummis aliquot aereis uncialibus epistola
De nummis aliquot aereis uncialibus epistola is a 1778 numismatic treatise by Francesco Saverio de Zelada, held by Heidelberg University Library and written for scholars of ancient coinage. Its engraved plates show paired obverse and reverse views of bronze Roman coins in numbered rows, with the heads and reverse devices drawn in fine line and stipple. A designer could take from them the crisp circular medallion framing and the dense, tonal hatching typical of 18th-century antiquarian engraving.
