Exceedingly rare, Ru washer with lobed mouth rim. Collector item.
Diameter 139mm, 5-1/2"inch
Extra info regarding: 1. Death bubbles, item less than 100 years may not show any death bubbles, the process is by replacing the trapped air with soil, so usually, the higher the color intensity, the older the item. 2. Calcification in the glaze, item less than +/-200 years may not show any sign of calcification. 3. it even need much longer years for item to show splitted crackles. This method of identification has been widely used in Asia. For reference, please translate "Microscopic identification of porcelain bubbles" to Chinese and copy paste and browse it. Inside you can find many info regarding micro identification.

Excellent condition without any chip or repair. Visible death bubbles.
The macro picture size is 1:4. For those who usually use a 65X magnifying glass, please divide the macro picture by 4 (four), each side.
Chinese Antique.