1970s Napier Two Toned Circle Pendant Necklace

The necklace consists of a pendant with a silver-tone and a gold-tone circle. The necklace measures 18" long and the pendant has a diameter measuring 3". The back of the pendant is marked 'Napier'.  

Length of chain: 18 inches 

Diameter of pendant: 3 inches

Maker: Napier

Material: gold-tone metal, and silver-tone metal