Missing complication(s)?

What complication(s) would you add to a collection that already had (not all in the same watch) a perpetual calendar, a tourbillon, a chronograph, a split second chronograph, an equation of time, a declination of the sun, a moonphase, and a 5 minute repeater (the minute repeater is going to have to wait). The only necessary additional complication I can think of is a power reserve indicator. I don't need an Astrolabium but really am interested in what other complications I'm missing. I do have an alarm, but it's electric. Oh, and a sundial, so I don't need one of those. Any help would be appreciated.

 

I thank each of you for your ideas and suggestions. I will research each of them, although some of them, I am sure will be too expensive for me.

dsd: When I wrote my initial post I did not consider my Rolex GMT 1675 a complication. Duh! My wife-to-be gave it to me many, many.....many years ago as a gift in college. It still keeps incredible time and is absolutely beautiful... SS/gold, jubilee bracelet, black face, black bezel.

ArtS: I'm not much into pocket watches as they can't be worn on the wrist. I only have one pocket watch, a Illinois Bunn Special 163A. I bought it at a NAWCC years ago. I couldn't pass it up. Very near mint condition.

And to TheDuke: I do have an electric alarm chronograph made to commemorate the BMW 2003 M3/M5. Some friends of mine got together and gave it to me as a birthday present years ago. I don't know who was making watches for BMW at the time. It just says ///M Power on the front and is engraved on the back. One of the engravings says "Japan movement".
I guess that means it's not Breguet.
Actually, I do have a couple multiple complication watches, eg, triple calendar, moonphase, chronograph, and a perpetual calendar moonphase chronograph.

Speaking of Breguet. Are any of you familiar with the 3137? That would fulfill my power reserve complication need.

Truly, Thank you again for taking the time to think and write.

 

Thanks for world timer the idea. I will check out world timers from other manufacturers as I already have a GP Ferrari chrono and as part of my collecting, in general, I try not to have more than one watch from the same manufacturer.

 

ArtS: That eBay watch was fascinating (and sold). The video was great. Not exactly my cup of tea though as I do like to wear my watches on my wrist.

 

Since you all were so kind to give me ideas, I wanted to give you the followup.
I did my research based on your suggestions and fulfilled two of my complication needs in one watch..... world timer and power reserve functions. Incredible watch......just got it yesterday. JLC World Timer.
Sincerely, I thank all of you for your help
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