Designer Modernist Silver Ring

Vintage modernist designer sterling silver ring. It is approximately a UK size N 1/2 or O. Weight is 7 grams. It has makers marks "PJ Co", is marked "SILVER" and has silver hallmarks for Birmingham 1972. It is in very good condition with small signs of wear commensurate with age

Condition: Very good condition with small signs of wear commensurate with age.
Colour/Gemstone:  Silver
Metal: Sterling Silver
Size: UK size N 1/2 or O approximately
Era: 1972