Mushmov, Nikola A. ТАЙНИТѢ ЗНАЦИ ВЪРХУ МОНЕТИТѢ ОТЪ СЕРДИКА. Sofia: D’rzhavna Pechatnitsa, 1926. Crown 4to, later brown cloth, gilt; original printed front paper cover bound in. (159)–217, (1) pages, including 2 plates of coins. Résumé in French. Near fine. An offprint from the Годишника на Народния музей за 1922–1925. Covers the mint marks used on Roman coins of Serdica during the third century (particularly during Aurelian’s reign), based on new findings from hoards uncovered in Plevna and Boïana. Very rare.