Wife and I went away for our annual anniversary weekend. Did a little bit of antiquing. No serious buying. I got one lens and she got a nice Hummel bell. But in one store in rural Ohio we saw this. Looks like an old plate projector. It is Bausch & Lomb. But beyond that I know nothing. Since this type of lens has no diaphram it is probably early 1880s or late 1870s, but that's my only guess. I just wasn't ready to pay $500 for it, or even negotiate, given the bellows condition.