This is a spare production run of 5-inch stew bowls with a tsuba (flange) from the HORIZON series, fired approximately 3 to 40 years ago for domestic/trade use. (There is no backstamp.) Nashi-ji (Pear Skin) refers to... a glaze that mixes iron powder with the glaze to create a texture like the skin of a pear. Stoneware refers to... the name of the clay used in this product. It has the durability of porcelain clay and the resilience of earthenware to ovens and microwaves. Although it is listed as a stew bowl in the catalog, it can also be used in microwave ovens and conventional ovens, so it can be used not only as a stew bowl, but also for gratin, au gratin, and salad bowls, etc. It is a versatile dish. Material: Stoneware Dimensions: Diameter 160mm x Thickness 47mm Inner Diameter 130mm 105mm when stacked in a set of 3 Full capacity: 400cc Oven safe Microwave safe Not for direct fire Orders will be closed every Saturday and shipped on Monday. If you would like to combine with other items, please inquire in advance via comments. Discounts may be available depending on the packing size and weight. As this is a handmade item, please refrain from purchasing if you are overly concerned about minor imperfections.