Vintage black bakelite and glass Art Deco Zephyr American Corporation Swivodex ink well with pen.

This inwell is the patent pending module. The base and top of inkwell are bakelite plastic. The inkwell is glass. No chips or cracks. 

NOTE: the inkwell has a slight color variation on the center front in the shape of a piece of tape? See photo. The black bakelite has a slightly darker shade in this area.