This is a Fire King Jadeite Flat Bottom [GLASS logo] Mug #001. *This item was purchased in the United States. ⭕This is a rare, early D-handle mug manufactured between 1946 and 1951. Due to its completely flat bottom, it is also called a flat bottom (or shaving) mug. Compared to later D-handle mugs, it uses more milk glass and has a stable weight, making it very comfortable to use. The color is Fire King's signature "Jadeite." This is recommended for those who like older antique Fire King items. By the way, flat bottoms were only made in early ivory and jadeite. Turquoise and white made after that do not have flat bottoms. The condition is excellent, with a glossy surface and very few scratches or stains. The mark on the bottom of the mug is "OVEN Fire-King GLASS." We ask that those who understand and appreciate antiques consider this item. ◆Condition◆ No chips or cracks, glossy, and all in beautiful condition. (We have carefully checked the condition, but please forgive any oversights.) Please check the photos for details. *Please refrain from purchasing if you are looking for something perfect or are concerned about minor details. ◆Size◆ Diameter: approx. 8.5cm (rim diameter) Height: approx. 8.7cm Capacity: 250ml Weight: 283g *Please allow for slight variations. ◆Product Information◆ 1 Mug The mug and everything in the photo is included. ◆Shipping Method◆ Anonymous Shipping We will ship via anonymous shipping with a tracking number. ◆Other◆ We do not smoke and do not own pets. *Please understand that this is an American vintage item with potential manufacturing imperfections such as hairlines (uneven mixing), burrs, warping, color variations, white spots, free bites, and air bubbles before purchasing. *The actual color may differ from the product due to the brightness of your smartphone and monitor settings. *To prevent product swapping, we will photograph and record detailed features (weight), serial numbers, etc.