This is a beautiful 19th century American yellow ware pottery teapot. The age is circa 1880. You can view a similar teapot in the "Collector's Guide to Yellow Ware, Book II" by Lisa S. McAllister, page 31. The author writes that several American potteries made a teapot with this type of mold, and that the pots with a blue glaze are of higher scarcity.
The pot is 9" high to the top of the handle, 7 ¾" long from spout-to-end, and 6" wide.The handle is a thick sturdy metal wire, going up to meet the ends of a carved wood handle. The wire has a mechanism that protrudes out above the lid to keep the lid on when pouring the tea. The glaze is in beautiful blue colors.
The inside rim of the mouth, the part of the mouth that is hidden by the lid, has nicks, chips and rough spots; these flaws are hidden under the lid. There are a few small flecks of wear to the glaze, and two chips around the top rim. The teapot is in remarkably good condition for its age and the type of piece it is. There are no repairs or restoration.