Hi Glassaholic,
It is not Seguso but believe its Venini... Also, this vase you have pictured was on another Murano glass message board before. I dont know if you can use the persons images. The vase was on loan to a museum too, so I don't know who has the rights to the photos now. We should really take into consideration what photos are "grabbed" and from where. Why dont you post your own photos?
Javier