Series of miniatures from the 18th to 19th centuries

Beautiful series of miniatures from the same collection, comprising two figures of a lady and a gentleman, a miniature (brooch) depicting a gentleman, a small miniature attached to silk, a miniature in a silver frame, and a large miniature in a leather frame depicting a young girl. Period from the 18th to 19th century. Dimensions: three miniatures are 7x5.5 cm, one miniature 6x4 cm, one miniature 8x9 cm with frame (miniature only 6.8x5.5 cm), one miniature on silk with silk frame 6.5x6.5 cm (miniature only 3x3 cm)