This is an ultra rare 1920's Elgin 14K white gold filled tank watch. This watch has a very rare case design. It is actually a three piece design. In addition based upon its year of manufacture the case is unusually large at 23mm in diameter and 35mm lug to lug. 

The dial has gold Arabic numerals and clean white background. 

This watch is powered by a manual wind 15 jewel USA watch movement. It has been serviced and is running well.

It will come with a one year warranty.