Vintage Square Signet Ring

This is a vintage 1980s signet ring by Charles Green & Sons. The face of the ring is square shaped and the ring has an engraved pattern on one corner and has been crafted in 18ct yellow gold. 

Condition: Used (Very Good)
Weight: 9.0 grams
Ring Size: U
Face Dimensions: 11.5mm x 10mm
Hallmarked: 18ct London 1986
Makers Mark: Charles Green & Sons
Period: Vintage
Box: The Vintage Jeweller Ring Box