Rowe Pottery Works Salt Glazed Crock Candle Tart Warmer Set 1993. Rowe Pottery Works Salt Glazed Crock tart warmer. Rowe Pottery is made in Cambridge WI and is very collectible for "newer" stoneware. Each piece is marked by the company logo. This piece also has the artists mark. Size is 4 1/2" diameter x 4 1/2" High. Great shape! Only 1 like it! Packaged carefully for shipment.