With those canes ... and the colour balance ... and the quality of setting ... and that design ... yes, it was made by Paul Ysart.
Edited to add:
I have never seen a weight attributed to Salvador which has the "half spoke with alternating canes" design. And, as yet, I have heard of no references to weights made pre-war and attributed to any of Paul's brothers. My belief is that the vast majority of weights (and bottles) made by Salvador, or possibly Vincent or Augustine, were from the Ysart Brothers period and therefore would never have had a Monart label.