I love this ring! a vintage 18 carat yellow gold bombé ring created from conjoined gold discs, almost honeycombey, and that's not even a real word!
It works really well mixed up with antique rings to give a contemporary feel, and when my model gets here on sunday you can see what I mean instead of having to look at it on my leathery hands!
 
stamped 'GB 750' = uk 18 carat
size - 6 and can be sized 
weight - 7.8g
measures 13mm wide north/south
English circa 1970 - 1980