Again Bank or Banker was a protoype that apparently never made it into major production. The image below is from a sales catalog. Clicking on the image will launch a marvelous animation created by Jeff Tucker, a devoted Ding and Zeroid fan. Jeff has also created a full length Zeroid animated available from PlanetZeroid. The images in the slideshow were taken from a robot collector's listserve and I assume it is an actual Banker.