18ct yellow gold. The fancy links have a Figaro style look about them, but are unique to itself. Stamped 750 on the lobster clasp and chain ends, no British assay marks, so this is most likely Italian in origin. Just to be certain I have electronically tested this bracelet to confirm it is 18ct.
The length is 8 1/2 / 22cm and each link has a width of 5mm wide and 17mm long. It has a nice heavy weight of 21.5 grams. This will be for somebody with larger wrists.