An ivory and gold-mounted portrait miniature snuff box and a mother-of-pearl, tortoise shell and portrait miniature snuff box

An ivory and gold-mounted portrait miniature snuff box and a mother-of-pearl, tortoise shell and portrait miniature snuff box
Apparently unmarked, circa 1770/1780
Of circular form, the cover centered by an oval-mounted portrait miniature depicting a male figure with powdered hair and wearing a blue coat, the base with secret compartment depicting a garland of roses and leafage, two doves below and centered by the monogram: LRC the other of circular form, all-over applied with geometrical mother-of-pearl-set motifs, the cover centered by a circular foliate-decorated gold-mounted portrait miniature depicting a male figure wearing a black coat and white collar
6cm. (2.3/8in) diameter 9cm. (3in.) diameter (2)