There's no kundan here and the workmanship is entirely Bengali, but in form and in shape this is an Aad from Rajasthan.
The paktar and ring-reji framed panel of chhela pyramids has a ring-ball mesh curtain beneath it that's weighed down by decorative double-triangle tassels with ball-jhur in between and at the bottom. The chakti-covered rings on top of the panel are the fastening points for the bunches of beads, and this too is a Rajasthani tradition. Hand made in hallmarked 22K gold. It's innovative and traditional at the same time, and gives the wearer the essential oomph without compromising on its lightness.
That's classic Gold Factory for you !