This is a rose spongeware mug from The Workshops of Gerald E Henn in Roseville OH. Featuring a red color with an Americana pattern, this 12 oz porcelain mug is signed by the artist, AM. The mug is a decorative and functional addition to any kitchen or dining collection, showcasing the craftsmanship and unique design of Roseville Pottery. According to the stamp on the bottom it is freezer, dishwasher, microwave and oven safe.