Carl Ditters von DITTERSDORF (1739-1799). Opera Apotheker and Doctor in Quartets for Two Violins, Altoviola and Bass (Schott, Maience, [1791]); 4 parts folio, pamphlets with original marbled paper covers with calligraphic title labels. Arrangement for string quartet by the composer of his successful opera Doktor und Apotheker (1786). Engraved titles and music, dimension 136: 20, 19, 15 and 15p. Signature "PP Kayser" at the head of the Violino primo part.