This unusual Ironstone jug was done in the "Pekin Japan" pattern, a black transfer pattern with over-glaze enamel decoration in orange, red, and blue. This big jug is about 9" high and 9" wide, and the hexagonal base is about 6-1/4" (15 cm) in diameter. It weighs over 2-1/2 pounds.
An example of this pattern is illustrated in "Godden's Guide to Mason's China and the Ironstone Wares" on page 164, plate 242. The jug shown there is Mason's, c. 1840-45. According to the Transferware Collectors Club database, the pattern is "Pekin Japan", which was used by both Mason's and Ashworth. The pattern can also be found on page 28 of "English China Patterns & Pieces" by Mary Frank Gaston. The piece shown there is by Ashworth.
This jug has no maker's name. The base is marked with a hand-written pattern number: 750 . Two straight lined tally marks are inscribed in the base. It was likely made by Ashworth, the company which took over Mason's. I date it c. 1870.
The jug was professionally repaired years ago. The spout has been re-made. There is one repaired spot on the outside of the handle, and one more small "touch-up" on the body. The quality of the repair work is excellent. I needed to use a black light to be able to report these repairs to you.