Maybe this helps: http://www.saxpics.com/conn/nw_virtuoso.htm
To have any chance, you need to check the serial number for the correct age against the range given in the top right corner of the link, and check the details in the description. Then take a good look at the pics.
But it sounds promising...
When WHO plays it?What does it sound like?
When WHO plays it?
It sounds like an alto when I play it.
It sounds even better when a saxophonist plays it.
I play trumpet.