Authentic New Martinsville Blue Bookends

Art Deco Blue Wave Bookends produced by New Martinsville.
These heavy bookends have a gorgeous light blue color to them. There is some roughness/chips/flakes on the inside of the bookends near the edges. Tried to show these areas in the pictures. These could be from the factory when they ground down the bottom of the bookends.
There are also bubbles and mold marks.

The bookends are about 4" X 3 3/8" and approximately 5" tall.

Please ask questions. authentic