gold bangle with diamonds

A 14 or 15 carat pink gold bangle with a double band with in between 11 old-cut diamonds (app. 3 carats H SI) graduating in size from the centre in a navette shaped silver mounting. Marked ET. Most likely English, circa 1890.

weight: 12.95 grams
size: 5.6 x 4.8 cm or 17.5 cm (for a normal wrist)
width: 6.46 – 3.25 mm