An Art Deco single stone diamond ring

An Art Deco single stone diamond ring,
with an old European cut diamond, estimated as approximately 0.79ct, double claw set to a sea scroll collet. Three old eight cut diamonds, milligrain set to each chenier shoulder, to a plain shank. Marked P. 15.70 x 6.20mm (including shoulders), 2.68g. Case by 'Goldsmiths' & Silversmiths' Company Ltd., 112 Regent Street, London W.'. Diamond assessed as approximately:
Colour: H/I
Clarity: VS1/VS2.
Finger size O½
Sold for £1,100