AW C 66 Ladies. 

Satin-finished bi-colour gold ring by Tony Williams, shown in white gold with yellow gold detail.  Suitable for wedding ring. Width 4.3mm; wall thickness 1.7mm. (This is the a perfect band to wear with AW C 65.)

Note: This ring style now has the contrast detail on one side only, not both as shown in this image.

Designer Tony Williams