Vtg 2 Marked 5 in" USA Blue Ribbed Pottery Stoneware Crock Mixing Bowls MCM For Sale

I have for sale a Lot of 2 matching 5 inch cobalt blue pottery stoneware serving or mixing bowls. They measure 5 inches diameter at the top and 3 inches tall. Please see photos for the best description of these 2 bowls. They are marked on the bottoms that they are 5 inch USA. The ribbing adds to the beauty of these 2 bowls. I believe they are probably from the 1950's, not sure, probably Mid-Century Modern.There are definitely imperfections, probably under the glaze or popping of bubbles or blisters of the glaze. There are no scratches or crazing. See last photo for a hairline crack that does not go through to the outside. They look like they have been used very little, if at all. I have owned these bowls for over 30 years and just used them for display on a shelf or they have been packed away. They've been stored in a smoke free pet free home and have no odors.I will plan to post USPS ground advantage. If you have questions, please ask. Thanks for looking and for offerding.