Chesler Products Mirror Clock

Chesler Mirrored Clock

According to a sticker on the bottom, this late 1930's vintage clock was sold by Chesler Products, of Brooklyn, NY.  The movement was made by Hammond.  

This clock's design offers a novel optical illusion.  Regardless of from what angle the clock is viewed, with the combination of the direct view of the base, and its reflection in the face, it always appears that the entire base can be seen, and the face seems to be transparent.

Hammond made a very similar clock under their own name using blue glass mirrors, with a more conventional face design.  The Chesler version may very well be a design patent infringement of a clock Gilbert Rohde designed for Herman Miller which used the same sort of chrome-finished balls instead of the traditional numbers.