Pfaltzgraff Yorktowne Tulip Mug Tankard Blue on White 1960s USA

This Pfaltzgraff mug was made in the USA in 1960-1970 featuring the Yorktowne tulip pattern. A beautiful blue floral stencil on greyish white stoneware. A flat based mug measuring 4.5 inches high by 3 inches diameter. This classic mug is in very good condition. No chips or cracks. Slight blemish/stain in glaze on face.