Antique Ohio First State Capital Sesquicentennial 150th Anniversary Chillicothe 1803 Plate. Original and Official Ohio 150th Anniversary Commemorative plate. Even comes with the original holder as I found it. I love the look of this plate, has a primitive/Americana look to it. It's in excellent shape! Under the building it says Chillicothe 1803. The back has lovely markings. Says March 1st, 1953. Walker True China Bedford OH USA. 1803-1953. Size is 10 1/2".