The Master Ultra Thin perpetual calendar line is where Jaeger-LeCoultre's in-house technology shines. As befitting the title of "ultra thin, " it packs a perpetual calendar function into a 9.2mm thick case. It is especially attractive for watch enthusiasts looking for high-end complication watches, As it is reasonably priced in the resale market.
This model has a significantly extended power reserve thanks to a movement update.

What is the watch diameter like these days?
After every rise comes a fall.

GMT Master 2 ‘Pepsi’
Discontinuation, is it true?
The color symbolizing GMT disappears?

Calendar
In-depth study of the calendar function to become an intermediate watch watch user.

Depends on the bezel
clock face
Bezel of the Rolex Classic Line

What If Watchmaking Had Its Own NVIDIA? Exploring the Potential for Exponential Growth in Watch Values
'Growth Collecting' as seen from the watch market

Leaving Rolex
Rappers?!
Rolex and hip hop second story

Stronger bezel,
Cerachrome
The birth story of the majestic Cerachrome

Everyone once
Used watches you find
What is the key to used watch trading?

IWC
Spitfire experience
Pilot’s watch perfect as a daily tool watch

India The Next Big Wave
A new stage in the luxury watch industry?