This is a rare, Ironstone pottery mug in the Gold Posies and Butterflies pattern, made by Mason's Ironstone, of Lane Delph, Staffordshire, England, circa 1818
Early Mason's ironstone mugs are rare. This mug has a vertically fluted shape, a scalloped wavy rim and a dragon loop handle.
The piece is decorated with one of the very early patterns called " Gold Posies and Butterflies" all against a mazarine blue ground. Similar mugs are also shown on page 194 of Geoffrey Godden's book, Mason's China and the Ironstone Wares, published by The Antique Collectors Club with more pictures of pieces with this pattern on pages 180, 190 and 191.
The mug is marked to the base with probably the earliest impressed mark of "Patent Ironstone China" in a circle, indicating a date of circa 1813 to 1820.
Overall, a rare Georgian period early Mason's Ironstone mug.
 
DIMENSIONS
Depth
3.07 in
Width
4.13 in
Height
2.75 in