9k Gold Chain Necklace Box Link 42.1cm / 16.5" Vintage c1980.
The gold mark can be found to the bale ring, this simply reads '9k' for 9ct gold. Good secure clasp with a good spring.
Length 42.1 cm or 16.5 inches.
Width of chain 0.2 cm or 0.07 inches.
Weight 1.8 grams or 1.125 penny weight.