Jaw
6177
A brief look at Master World Geographic
(The Master World Geographic)
Following AMVOX-2 and Reverso Squadra World Chronograph, The Master World Geographic is the follow up of using watch case integrated with its movement. The Geographic function consists of a mechanism combining the case and movement and enabling one to activate the city disc. The city disc is thus guided separtely from the movement and this made it ossible to design a reasonably-sized watch.
In terms of function, the 24-hour ring directly indicates the time in 24 cities visually in relation to JLC terms as the privilege time zone shown in the 7 o'clock Hour and minute hands (same time as the privilege city as marked by a red triangle at 6 o'clock). In terms of aesthetics, this is one of my strong favourites.
While the explanation below is long and seemingly complex, the adjustments of the watch, and with the watch in my hand, is instinctive and user-friendly. I was able to figure out the watch in 3 minutes after playing with it without reading the instruction.
(The time can be told immedately from the 24-hour ring, in this case Auckland is 05.00 hrs plus in the morning and Sydney is 03.00 hrs plus in the morning, When summer time is operating, Auckland is 06.00 hrs plus in the morning and Sydney is 04.00 hrs plus also in the morning - the 2 small red triangles dividing Samoa & Hawaii is the International date line)
(In parallel, the Master World Geographic provides a quick and easy reading on a subdial at 7 o'clock of the hour and minutes indicated by the red triangle pointing to London (or Azores in Summer time). The time in what JLC termed as the "privilege time zone" thereby appears twice: In the 7 o'clock subdial and on the 24 hour ring.
For a more balance aesthetic, the crown driving the city disc is placed at 2 o'clock instead of the 10 o'clock position.
The watch need to be set only for the first time you use the watch, to synchronise the city marked by a red triangle at 6 o'clock to your residing city, with the the main time, the 24 hour ring time, the clock counter at 7 o'clock and the main hour and minute hands showing exactly the same time.
(1) if this has not been done, set the main hour and minutes on the watch to local time.
(2) turn crown at 2 o'clock.Display through at 6 oclock, facing the red triangular marker, the city that corresponds to the right time zone. The hour hand in the subdial moves accordingly.
(3) Pull crown at 4 o'clock out to position 2. By turning the crown clockwise or anti-clockwise, the privileged time-zone hour hand will move, simultaneously driving the 24-hour ring. Adjust the time in the subdial to show the same time as the main time, and display this time at 6 o'clock, taking account whether it is day or nigh. Push the crown back into position 1.
The displays are now syncrhonised.
(Pink Gold Master World Geographic, limited to 500 pieces only)
Once this pre-adjustment has been made. you can read the time of any of the 24 cities by simpling looking at the 24-hour ring indicator against the target city.
When one travels to another city. Turn crown at 2 o'clock position (The crown at 4 o'clock must be at position 1) clockwise or counter clockwise until the destination city is shown at the 6 o'clock triangular marker. Once this is adjusted, the main time is your home time, and the 7 o'clock clock counter will show the destination (local) time.
A note on summer time, which is now directly indicated on the city disc.
Countries in the Northern hemisphre that use daylight saving time do so between March/April and October.
In Europe, apart from Iceland, between the first Sunday in March and the last Sunday of October.
In North America, between the first Sunday in April and the last Sunday of October.
The hour change also takes place in some countries of the Southern hemisphre but at different dates. The three countries concened by this situation and appearing on the time zone disc of the watch are Rio de Janeiro, Auckland and Sydney where "summer" time extends from October to February or March according to annual decrees.
In order to correctly read off the time in 24 time zones, one should consider the geographical location of the country and see if it is in the northern or southern hemisphere.
(Stainless Steel Master World Geographic)
Specifications as supplied by MJLC:
Movement:
Manufacture Jaeger-LeCoultre, calibre 936, mechanical automatic, crafted, assembled and decorated by hand. 28,800vph, 43-hour power reserve, 38 jewels, 322 parts, 4.9mm thick.
Functions:
Hours, minutes, sweep seconds, power reserve, date, world time indication showing all 24 cities time directly, privileged time-zone display in hours and minutes hands.
Function adjustment:
Crown at 4 o'clock serves to:
- Wind the watch if it has not been worn.
- set the local time
- synchronise local time and the time-zone system.
Crown at 2 o'clock serves to:
- Display the chosen city at 6 o'clock and automatically show the time in this privileged time zone on the subdial.
Corrector at 3 o'clock
- sets the date
- corrects date after months with less than 31 days.
Dial:
Steel version
Silvered applied rhodium-plated gold numerals and hour markers. Grey and blue (day/night) 24-hour ring, 11 luminescent dots.
Pink Gold version
Silvered, applied gold-plated numerals and hour-markers. grey and charcoal grey 24-hour ring (day /Night), 11 luminescent dots.
Hands:
Hours, minutes, alpha in gold plated or rhodium-plated brass, luminnescent.,
Others
blue varnished gold-plated or rhodium-plated brass, luminescent.
Case diameter 41.5mm, cambered sapphire crystal, hardness No. 9, sapphire crystal back revealing the movement.
Water resistant to 50M
Materials
18-ct pink gold (limite to 500 pcs) and Stainless Steel (not limited0
Straps:
Matt chestnut brown or matt chocolate brown alligator leather, 21/16, steel or pink gold folding clasp.
cheers
Jaw