A late 17th century Stuart crystal momento mori slide

A late 17th century Stuart crystal momento mori slide, the faceted rock crystal covering a white enamel skull beneath a Ducal coronet and between the intials K S, on red plaited fabric background and gold wire frame, mounted in gold. 2cm.

And another late 17th century Stuart crystal morning slide, rectangular and containing the gold wire initials C S, on a finely plaited hair ground, gold mount. 1.5cm wide.