If it's the Redfield M294 setup like pictured below then the barrel has been D&T for the base. They come up for sale on ebay now and then and don't sell for a lot. It's kinda a cool setup but from a collectors point of view it doesn't add a premium, just the opposite.

[Linked Image]

Charter Member
Ancient order of the 1895 Winchester

"It's an insecure and petite man who demands all others like what he likes and dislike what he dislikes."
szihn