Vintage USA Handleless Crockery Custard Cup Coffee Mug Stoneware Set of 4

Vintage USA Handleless Crockery Custard Cup or Coffee Mug Stoneware Set of 4 They are about 3" tall. They are a beige color with the inner cup and rim being a dark brown. They are all marked USA on the bottom. Great condition. No chips or breaks. See pictures as they are part of the description.