This is a window fro one of the DC-10's from the 10Tanker company.  This window came from one of the  tanker aircraft that fought the Lake County California wildfires in 2009. https://www.fire.ca.gov/incidents/2009/9/7/oasis-fire/

This window shows signs of ware as befiting its age and service. It is for colletable use only!! 
It would be agreat piece in a mancave or hanger!!! Buy a piece of history!!