A large collection of cut steel jewels, late 18th/early 19th century

A large collection of cut steel jewels, late 18th/early 19th century, comprising: three necklaces, one composed of oval links connected by two rows of chain, length 47cm, another a choker on a black velvet ribbon; six pairs of earrings, including one set with simulant pearls, longest 6.5cm each, all with hook fittings; a chatelaine; a belt, length 60cm; a bracelet composed of four plaques connected by string; three bracelets on ribbon; five slides; a set of three matching panels accented with pink glass beads and velvet, one with a buckle fitting; four brooches; the side panel of a tiara; two bracelet clasps; the central section of a choker necklace; two pairs of buttons and two heart-shaped motifs