AM/PM / Clock AM/PM

Wall Clock AM/PM
A wall clock that shows both, the antemeridian and postmeridian version
of the daily hours, depending on the position of the viewer.
The dial is printed with the lenticular print technology, which is also
used for some postcards and lenticular images.
this technique makes it possible to print two images into a single space;
which image is observed depends on the angle from which the object is
viewed. Thus if the viewer moves around ‚am/pm‘, the dial changes to
show either the numbers from 1 through 12 or those from 13 to 24.

Video:

www.youtube.com/watch?v=jU_gjJgM5aU