Four miniatures "PORTRAITS OF GENTLEMEN AND GENTLEWOMEN"

Four miniatures depicting "PORTRAITS OF GENTLEMEN AND GENTLEWOMEN". One signed HERMO lower right. 19th century. Two in wooden frames and two in burnished metal and velvet.
Measurements with frame: 11x9.5 cm approx. for the two rectangular ones and 13.5x11.5 cm approx. for the two oval ones