This is a really nice view. It is Keystone #19191 and is entitled "U. S. Observation Airplane on West Front--France". The description on the back tells about how these planes provided reconnaissance information, how they were manned, etc. This view is in very good condition with only minor imperfections, including a bumped corner on the lower left. All-in-all a very nice view!
This view will be a nice gift for one interested in airplanes, stereo photography, or war memorabilia.
I will be happy to combine purchases to save on shipping costs. International orders are always welcome.