Hey cogar (& anybody else interested) ... here's an image of the Roseville 'experimental' vase I'd mentioned in an earlier post here .
You can see the 2.08 min video & view the glaze markings on it (it does take a little while on dial-up , but it's worth it to see) . Phoenix , AZ show , hour #3.
I've never seen these types of marks "published" for the common consumption on any video media before & I'm surprised that they really did it !
Estimated value - $3500 to $6000 .