The Weekplanner Hemipod is an example you don't often see. It is powered by the ETA 2892.A2 which has a crazy complication. All in all, it features the moon phase, day of the week, day of the month, month, and even the actual week of the year. The moon phase isn't the traditional complication. The moon itself stays in position on the bottom of the register while a plate turns over the moon to display the actual moon phase. The orange hand indicates the specific week out of the year and the month. All these functions are changed via the four pushers on the side of the case.
The case itself is 44mm but keep in mind it has no lugs which means it actually wears much smaller than its dimensions. On my wrist, which is a little over seven inches, it wears great and it's very comfortable.