Sterling Silver Chain Necklace 45.0cm / 17.7" Vintage c1980.
The silver mark can be found to the link adjacent to the clasp, this simply reads '.925'. Good secure bolt ring clasp with a good spring.
Length 45.0 cm or 17.7 inches.
Width of chain 0.1 cm or 0.03 inches.
Weigh 1.5 grams or 0.9 penny weight.