Purists,
Let's see your complications.
Anything goes. Dates, multiple time zones, chronographs, it's your choice.
Allow me to open with a simple one (without date!!!):
A regatta watch:
Is a chronograph with a display where each "dot" (Blue or red) measures one minute.
Love this curious complication (The compass in background is a Silva, made in Sweden!).
Also good in B&W. Notice how the chronograph pushes are on the other side.