Most of the Victrons I've seen are pretty bland, uninteresting machines, but this one looks like it has quite a spec to it. Sound? That depends it it's pre or post US and European influence. All the Japanese manufacturers started listening hard to the Western dealers and players in the late 70s, with good effect. If it's 'pre', then expect a thinnish sound. If it's 'post', flutes should have improved a lot and instrumental sounds would have lost some of that bright 'edge'.
Depends how much it is, of course. In the UK, probably near zero due to its age and size, but once you cross the Channel or North Sea, prices take a real upwards hike!