9 Carat CT Not Hallmarked Gold & Diamond Signet Ring Size V 5.2 Grams
When sizing the ring it covers the 'V' but having a bit of width it ranges between an U 1/2 to a V 1/2, so I've said it is a V.
It has been resized before as there are 2 soldered splits either side of the diamond - see pictures.
It is not hallmarked but has been tested and it is 9 carat gold. The inside does have the inscription of: 'Together Forever 09-08-80'
I have tested the stone and it is a diamond.