They appear to have happened during the production/firing of the pottery because they are glazed over. Integrity of crock not affected; it is water-tight. Some rust is present on the metal portion of handles. Wear is consistent with use and age of crock.
Please look closely at photos. The item "Antique 15 Gallon Patent 1915 Red Wing Stoneware Crock Original Handles Vintage" is in sale since Tuesday, July 25, 2017. This item is in the category "Antiques\Decorative Arts\Ceramics & Porcelain\Crocks". The seller is "cherished86" and is located in Muskego, Wisconsin.
This item can't be shipped, the buyer must pick up the item.