Bausch and Lomb finder

Can anyone provide a little help here? I have an 8x50 Bausch and Lomb straight through finder. Couldn't find any listings for such in the classifieds. Does anyone have any idea of its age or value?

Thanks,

Dave

There was a time in the mid-80s when B&L took over the Criterion product line and continued production for a few years with B&L name on stuff. It may be from this era. See http://www.telescopebluebook.com/ under SCT -> Criterion/B&L. Value? If we just look at it like any well-used 8x50 finder, perhaps $35 - $50. If it is in "near-new" condition and you found someone restoring one of the old scopes who needed it, it might go higher.