This is a set of two ultra-rare, ultra-heavy coffee mugs from Fire King's Jadeite (emerald green) series, which is overwhelmingly popular among beautiful Fire King items. The markings are from the 1950s. Markings: OVEN Fire King WARE One of them has the manufacturing lot number "3". Heavy Mugs Weight: 439g and 449g, these are very heavy and rare items. * In beautiful condition. These were acquired about 20 years ago at an antique shop in America. They have not been used at all since purchase. They have been displayed on a shelf. They are in beautiful condition. Due to circumstances, I am selling them to downsize my collection. [Exterior Check] They are in very beautiful condition. They have a good sheen and are in excellent condition. As they are vintage items, there are slight manufacturing imperfections, such as minor dirt, clouding, and small scratches. There is also some signs of use. As you can see in the photos, there are very small chips on the rim. If you are concerned, please check the photos before considering a purchase. The price reflects the above considerations. [Notes] I intend to ship promptly, but there may be slight delays due to work or other circumstances. Thank you for your understanding. I will prioritize the buyer who purchases first, even if we are in the middle of a Q&A. Most Fire King and other milk glass products were manufactured between the 1940s and 1970s. I am not a professional appraiser, so there may be oversights, but please understand. Please understand the quality of vintage items before making a purchase decision. #AmericanVintage #Glassware #MilkGlass #RestaurantWare #DHandle #FireKing