My thanks to those who have offered info. There is a bit of controversy in the history of this drum... my father was a drummer on the LV Strip in the early 60s, and according to him, Louis Bellson was also playing in a nearby club, when someone stole this drum from backstage. My father came across the drum shortly after in a local pawn shop and picked it up, giving it to me when I started drumming in the early 80s, but it didn't go with my kit. It has been in the case mostly, for those 30 or so years.
Now, I don't believe my father to be the "thief" as I always knew him as an honest man, and he loved Louis, don't think he would steal his drum. Even in the 60s, I can't imagine a pawn shop taking an item with a scratched off serial, so that part is sketchy, but my father has since passed, so I can't go back to the source!
I believe that is the reason the shell was not drilled for a muffle - Louis didn't use them, I read.
At any rate, that's as much as I know, and here is a photo of me playing the drum, circa 1968.
Is it inappropriate for me to question the experts on a ballpark value? Or where would I find this out?
Thanks, folks!