I my "new" home had a Siwelclo toilet that we just removed because the tank was badly damaged. The patent dates on the back of the bowl are Jan 20, 1899 and Feb 6, 1900 and there is also a Trenton Pottery (T.P.CO) mark. The bowl and tank lid are in great shape. My husband wants to put them out to the curb for bulk pick up, so if anyone can use them, please let me know asap!