c1920 a superb example of workmanship is showing in this diamond bangle. 
To the centre a cluster of 12 old cut diamonds with the centre being an estimated 2.50 carats.
The cluster is flanked with a graduated taper to each side; down to the hinge and clasp. 
The bangle frame is a heavy two track frame with circular  round posts at intervals through the lower half of the bangle.
Secured with a push tongue clasp, safety chain present.