Found this guy in my office today. It's a long story, but needless to say it's probably relatively old. It's a Beattie Intenscreen for "Calumet 540 4x5 with grid".
Is this guy worth keeping? Is it worth anything? At some point, I'd love to get into 4x5 photography, but it will be a while. Should I keep this around? Does anybody want it?