Antique USA Pottery Mixing Bowl Wonderful Patina

This beautiful old bowl belonged to my 85 year old Father in laws Aunt Nel. She was quite famous in the kitchen and spent most of her time there. She took pride in her cooking as well as her cookware. So every piece she had was well used and well loved. This old bowl has crazing throughout the interior that attests to it's age and adds to it's character. It ismarked USA on the bottom and there is a makers marked also but I can't make it out, There's to heavy of a glaze layer. It almost looks like it says Fiesta, perhaps one of you can tell me. There is a tiny chip in the glaze at the bottom of the bowl, but it's a glaze chip not the pottery itself. For the most part I consider this in excellent vintage condition. I personally love the well used and loved kitchen pottery, it's full of history. The bowl is 7 3/4 inches across and 4 inches tall. I'm hoping you can see the interior patina in the pictures. Thanks for looking.