The canes and shape look like Seguso to me. Can't help you with age tho. I would make a guess of maybe 50s or 60s.
I have two Seguso 'garlanded flower' weights. The garland is a single row of cane clusters as opposed to the two in that weight and the flower in the center is a large murrine.
The flower in that weight does not look like lampwork. It looks like it might be a transfer with the flower having been hand painted on paper and inserted in the weight.