This is a vintage 9ct yellow gold belcher chain with swan, heart padlock, and faceted bauble charms.
 
I love the bubble-esque shape of the chain links, along with the stunning and timeless charms. 
 
Swans are associated with fidelity, loyalty in marriage, and monogamy because they mate for life. Along with the love heart charm, and never-ending nature of the bauble, it's the perfect gift to show someone just how much you love them.
 
Measurements:
 
Drop from chain to bottom of heart pendant 2.1cm
Drop from chain to bottom of swan pendant 1.8cm
Drop from chain to bottom of bauble pendant 2.2cm
Total length of necklace 53.2cm