Digby Antiques (Wiltshire) has dated this piece to the Victorian era.
The hook at the top would loop over and around a button and the buckles would attach to fabric.
The chains move through the buckle ends so giving some movement as the body moves.

Engraved with the owners initials (we believe she was a nurse) Cross keys date of 16th November 1858. They were given as a gift from BGL.
No silver marks but tested as silver. Great quality and condition.
L 22 cm
W 5.5 cm
Digby Antiques (Wiltshire) has dated this piece to the Victorian era.
You can view the stock and full dealer information on the Digby Antiques (Wiltshire) Profile Page