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The web address of the Historical Society Of Watertown is: http://historicalsocietyofwatertownma.org
The phone number of the Historical Society Of Watertown is: 617-923-6067.
The address of the Watertown Free Public Library is: 123 Main St., Watertown, MA 02172-4401
The address of the Plumbing Museum is: 80 Rosedale Rd, Watertown, MA 02472
500,000 approx :)