The World's Most Complicated Watch - there was a day....there was a night

Back with a new hint on Vacheron Constantin's Grand Oeuvre this time with duial sectors indicating the time of sunset and sun rise as well as the number ogf hours of daytime and night time

The sunrise sector and hand for this watch indicate the changing times of the sunrise throughout the year, the earliest at 4am through until just before 8am depending on the time of year. The sunset is registered in the other sector calibrated for sunsets which can start from 4pm until around 7.30pm again depending on the time of year. The lower sectors are the indications for day length and night length and display the appropriate number of hours in the day time from the time of sunrise and also the number of hours of night time from the time of sunset. For example, if the time of sunrise is 4.30am and time of sunset is 7.30pm, the length of the day is therefore 15 hours. From sunset at 7.30pm to sunrise at 4.30am the length of night time is 9 hours, this gives a total length of night and day for an exact 24-hour period.

The World's Most Complicated Watch - there was a day....there was a night
This is just plain freaking awesome...That means the time of sunrise and
06/23/2015 - 16:51

time of sunset are mechanically programmed to change over the year depending on where this dude lives...and depending on this, the length of day and length of night, and the time of sunrise and senset is probably also connected to the the other calendar functions shown earlier including probably the sky chart etc. etc.

Simply WOW.

From the hints you have shown so far you have shown complications most brands will not be able to master, and yet what you have shown is only the appetiser. I am sure there is more to come.

I have always thought this to be a great complication
06/23/2015 - 21:24

The sunrise and sunset times.  I have never seen an "hours of daylight" and "hours of darkness" indicator.  I have never researched the astronomy behind it, but I suspect the mechanics of the sunrise sunset calculation must be pretty complicated.  I'll bet this piece has an equation of time complication as well.  Has this been revealed yet?  This also makes one wonder if the "do not disturb setting" that this amazing watch has could be configured to "not disturb" after sunset.  That would be an interesting integration of complications.  Or maye to be in Grand Sonnerie mode during daylight hours, but use Petite Sonnerie during dark hours.  Many interesting potential applications.  Very cool complication.

Re: The World's Most Complicated Watch - there was a day....there was a night
06/24/2015 - 18:17

Hi Alex,

I'm not sure I fully understand the function.

For example: The latest sunset on this scale would be 1930 hours, yet there are many place in the world north and south of the equator (depending on whether it's winter or summer) when sunset occurs much later or NOT AT ALL.

In fact in the northern hemisphere on the longest day (approx. June 21) sunset at 1930 occurs in the caribbean.

So I'm not sure whether these indicators are for a fixed latitude.


they're fixed for the city of residence of the owner which explains the calibration of the dial
06/25/2015 - 09:45


This calls Moscow into question...
06/25/2015 - 10:17

According to THIS SITE at least, some of these calibrations fall outside of the extremes in Moscow. For example, assuming this website is correct, June has over 17 hours of daylight in Moscow with sunrise before 0400 and sunset after 2100 (which is "off the charts" for this calibration). Don't feel too happy for the Muscovites, they pay dearly in hours of darkness in December. Does the plot thicken, or have I missed something?  Perhaps our customer is Russian, but from a location a bit nearer the equator?

the plot thickens........
06/25/2015 - 10:20


Grozny? Ukraine?
06/25/2015 - 10:40

In my quest to test the extreme Southern latitudes of Russia, Grozny's sunset and sunrise data are almost prefect matches at the extremes for the calibrations on the dial. Interesting.  Sunrises in June and December about 0430 and 0730, respectively. Sunsets in same order about 1630 and 1930. Daylight lengths from 9 to a bit over 15 hours (ish).  Very interesting indeed. I am sure there are many cities with these approximate statistics, but still interesting. Clearly, Grozny is near the Ukraine, so perhaps our customer is not Russian at all?

Maybe its Putin...He is Russian but is also the world's richest man, so
06/25/2015 - 12:47

might have homes all over, including Ukraine.

He is more on PP side...
06/25/2015 - 17:24

.. with his PP Perpetual Calendar: 

He is more on Patek Philippe side...

So how about Ukrainian ex-President Mr. Yanukovich who is known as VC fan with his Patrimony?

He is more on Patek Philippe side...


I think its a Blancpain as the photo of the PP is actually that of a
06/25/2015 - 18:04

fake indecision

Probably yes, Sir, as I'm not too familiar with PP so..
06/25/2015 - 18:37

.. let me please add another picture - does it look closer to PP PC?

Probably yes, Sir, as I'm not too familiar with PP so..


Hopefully Putin won't decide that...
06/25/2015 - 20:38

The Quai de l'Ile is a stratefically significant piece of land.  Let him go over to Schaffhausen of Glasshütte if he needs more land.

You're right..
06/25/2015 - 17:31

.. but I always felt what November is the darkest month in Moscow smiley Usually only 1 sunny day per November.. crying