It is marked as shown in the photos: FRANK W. HAY & SONS, JOHNSTOWN PA. You can see a raised line around the stem of the pan on the bottom. This is typical of these pans. It is a line that is a result of the casting process; it is not a crack.
I have cleaned and seasoned the pan with one coat of lard. The first three pictures are after seasoning, the other three are before.The item "Frank Hay 1891 Rare Griswold Bundt Pan Cast Iron Johnstown PA" is in sale since Thursday, March 09, 2017. This item is in the category "Collectibles\Kitchen & Home\Kitchenware\Cookware\Cast Iron". The seller is "ynotbop" and is located in Altoona, Pennsylvania. This item can be shipped to United States.