In my opinion, 1890-1910 seems too early for this design. I have had two vases with this interlaced SN mark and number, one moulded with a pair of goldfish on each side and one with a design of geometric rays and flowers. Both were bought from France and I believe that both may have originated there given the style.
The design seems much more typical of the mid 1920's to 1930's, certainly the geometric vase is reminiscent of patterns by both Muller Freres and Hunebelle in its combination of natural and geometric forms, while the vase in the link is vaguely reminiscent of a Verlys pattern from the mid 30s. All the vases I have seen with this SN mark were similarly finished, apparently machine blown and with the outer surface satinised.
If anyone has any further information I would be very interested to hear it, not least because this mark has baffled me for some time. The only thing I can add is that I once saw one offered for sale where the seller was making a connection with LeGras, but whether this has any basis in fact or not remains to be seen....
Steven