Hi Gary,
I think you haven't gotten a response because no one knows what the value would be.
Something like this would only appeal to a certain catagory of collector. Mainly as a conversation piece. The eye cup missing, means that it's not complete and original, and getting an original replacement would be next to impossible.
I wouldn't think that the value would be all that high. This is just my opinion and I could be wrong, but I don't think that I would be tempted to pay a whole lot for it. If you like it? That's all that matters and if you want it, go for it.
Ron