Walter, you may email the photos to me and I can post them for you, it sounds like you've got an old photographers darkroom lantern, these typically have a flip up door in front with different colored glass panes or lenses which are removable and switched for processing various types of photo media. most have an amber, red and clear glass panes, there were several makers of these. You can try a Google search for darkroom lantern and check out the images tab and you can see some of the different types made maybe you'll even find one like yours.

Willis