This is a Fire King Jade-ite Extra Heavy Mug from my home collection. I purchased it at an antique shop in the United States. Jade-ite Extra Heavy Mug ■Size: W11 x H8.7 x φ8.5 ■Markings: OVEN Fire King WARE (1950s markings) ■Condition: Excellent to Near Mint No cracks or chips. There is some minor wear, but no noticeable damage. Overall, it's a beautiful item with a good shine. Slight scratches are visible on the rim, handle, and sides. There are air bubbles, metal marks, glass imperfections, white spots, and hairline marks (indentation lines) from the manufacturing process. Both the inside and outside are smooth and have a very good shine. #Antique #FireKing #Jadeite #Mug