According to the intertoobs, a person can find that information at the public library. If it were me, I would ask a librarian what the best way would be.
One suggestion says to look under the lid of your toilet tank (assuming it's original to the house) and check the manufacture date.
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branchandroot
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Date: 2013-10-27 05:26 pm (UTC)One suggestion says to look under the lid of your toilet tank (assuming it's original to the house) and check the manufacture date.