Kugels are colored within the glass, not painted or finished on the outside, and the mercury silvering is on the inside. The ornament has magnificent deep cobalt coloring and excellent mirroring. There's a bull's eye circle of inner mercury degradation on one side, shown in the third photo. The glass kugel itself has no damage. There are a number of tiny bubbles in the mercury or glass, very common.
The veined five leaf type brass cap will slide a bit when pushed but is very secure. For being well over 100 years old, the kugel is in wonderful condition. The blue color is actually darker than most of the photos show. See my other listings for hundreds of antique and vintage Christmas items. Almost all my items are antique or vintage and come from a variety of sources.I cannot guarantee that any item is from a smoke-free or pet-free home. International customers are always welcome. The item "Antique Large Cobalt Blue German Glass Kugel Christmas Ornament" is in sale since Monday, January 13, 2020. This item is in the category "Collectibles\Holiday & Seasonal\Ornaments". The seller is "copper-maven" and is located in Roy, Utah. This item can be shipped worldwide.