I found these large, heavy pieces of plexiglass while cleaning the shed on the property of a house that I just bought. I have no idea what they are or what they are used for. They are about the size of a kitchen table and if there wasn't 6 of them back there, I would have guessed it was an old table top. As you can see from the pictures, they are very dirty, but from what I know about plexiglass, pieces this size do not come cheap.
The 6th piece is on the right side of the other 5. It seems to be of higher quality, you can see from the pictures that it is more clear. It is also heavier. It also has a crease around the edges of it that you can see in the pictures. I thought it was real glass at first based on its weight and hardness.
Any idea what these are and what they are used for?
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