This is very much like a Duron, but having the skirt as part of the chalkware and not a piece added after is something Duron did not do.
It was designed by Quattromini who also designed table lamp standards. More information on Quattromini and Berti can be found here.
Do you have this piece? I would be interested to know how it was finally sold and whether it was painted or lacquered (perhaps black?) Please do get in touch.