Declaration Of Independence Copy

I have a copy of the Declaration Of Independence that I got from my grandmothers estate in 1992.  She was 97 when she died and I have no idea where or when she acquired it.  As far as I know when she was alive she didn't even know she had it so I know nothing about it's origin.  It is definitely old and I'm afraid to handle it much because the paper is very old and is rolled up.  The roll is in broken in two main (rolled up) parts with a few small parts broken off but it all is still readable as The Declaration Of Independence complete with signatures.  I unrolled it without further damage and took these pictures:

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