This watch face uses geometric objects to tell the time.

The first row is 3 hr increments, the left box in the second row adds 1 hr, the right adds 2 hrs.

Then row of triangles are 10 minute increments.

The bottom square is the final digit of minute represented using binary.  The left triangle is 1 minute, the top 2, the bottom 4, and the right 8. 

Adding all areas gives you the time.