Vintage unsigned Scandinavian sterling silver, gold tone and red enamel love heart necklace with real freshwater pearl and crystal drops

Lovely piece of Scandinavian jewellery which is not signed but I believe is classic Danish or Norwegian enamel-work. It has sterling silver chain sections, links and spring ring clasp. The gorgeous red enamel heart-shaped panels are a gold tone metal - not sterling silver as far as a know. The red enamel work is stunning and in lovely condition. In between the heart panels are white freshwater real pearl drops with slightly grey crystal faceted beads. 

It has a length of about 18 inches and fastens with a secure spring ring clasp that is stamped 'STG 925' for sterling silver (925 parts silver per 1000). It is in very good vintage condition.