Most likely made by Salvador Ysart - maybe in the Ysart Brothers period or maybe pre-war.
In my Salvador / Ysart Brothers collection I have
1. A Star pattern weight made in much the same way, with the canes of the star being "packed together" causing some slippage of the pattern. My weight has a direct match to one of the canes and the base has a shallow ground central area but the main base is not flat polished.
2. Another weight in my "Salvador" collection, has the same style finishing to the base as the one shown here - and very much like the finishing on some of the (pre-war) Monart vases etc. Was that finish also used on some of the Ysart Brothers (Vasart) period items?
I can also match two other canes to ones in my "Salvador / Ysart Brothers" group.
Edited to add: The base finish I am referring to is a mix of two "Monart" styles that may have only been used on paperweights (?). See
http://www.ysartglass.com/BaseLabel/Bases.htm and look at refrences 2 (first pic), 3 & 4 for the wider flat polished base ring and then 6 & 9 for the central concave area. Note that those reference pics do not show any central concave area that has been polished - but that feature does appear on some of the "Salvador / Ysart Brothers"weights.