No idea really but I think I will go with an industrial application such as suggested by Rob.
One thing for sure this is
not for standard large format film photography, or a standard large format enlarging lens as there is no aperture control.
With its fixed aperture it is more like a supersize projection lens.
Here is a link to a Nikon monster which at first sight is a puzzler. but makes a bit more sense when you read the application.
http://homepage2.nifty.com/akiyanroo.../faxortho.html
Don