Here is a pre-owned, very thick curved plexiglass, or similar hard thick molded plastic, porthole style window.   It measures about 13 inches long and is about 9 3/4 inches wide and over 2 inches thick in the center.  The plexiglass has a magnifying effect and could have been used for a display to give some enlargement when viewed.  (I provided some pictures showing dimensions on a box enlarged through the porthole.)  The black frame is a paint or dye on the plexiglass.   There is some dirt and a few scratches on the surface and some wear on the black framing.   There are screw holes at each end, but I do not have any hardware.   Please see the pictures and ask any questions.   

Thank you for looking.  (Inv 22,965)