
amanico's detailed post from SIHH 2012 introduces the Jaeger-LeCoultre Grande Reverso Calendar, a timepiece that aimed to fill a historical gap in the Reverso line. His analysis delves into its aesthetic and technical merits, comparing it to historical JLC calendar watches. This article remains relevant for understanding the evolution of JLC's iconic Reverso and its calendar complications.

The Patek Philippe World Time reference 2523, launched in 1953, is distinguished by its innovative two-crown system. One crown serves for winding the watch, while the second, positioned at 9 o’clock, controls the city disc. This design marked a significant development in the functionality and user experience of world time complications for the brand.
The reference 2523 was offered in two primary versions. The initial ref. 2523 featured larger lugs that extended above the bezel, with a case diameter of 35.5 mm. A subsequent variant, ref. 2523/1, presented a slightly larger diameter of 36 mm and thinner lugs that were integrated without extending above the bezel. Both versions were powered by the caliber 12-400 HU, which incorporated the world time module developed by Louis Cottier.
This reference appeals to collectors interested in Patek Philippe's historical advancements in complicated watchmaking, particularly the evolution of its World Time series. The distinct design differences between the 2523 and 2523/1, especially regarding lug integration and case dimensions, provide specific points of interest for enthusiasts tracking the model's development and variations.
I like it a lot....maybe movement is too small?YES but fantastic visual solution to frame it with the same cote de Geneve around it and a very nice art Deco inspired guillochet on the outside,so see through case back,why not? Thank you Nico for the beautiful pictures. Mo
...for both the SS and RG versions?
Count around 5 moreK Euros in Rose Gold. Best, Nicolas
I ma not disturbed by he see through case back, but I am not completely crazy about sapphire case backs in general, I have to say, uness there is something really exceptional, or, at least, very nice to see. But, as it is, I am sure it won't be an issue for those who love the watch. Best, Mo. Nicolas
...this watch is a winner! It fills the gap as you suggested. A gap which should never have been there in the first place. Because when you think about it, the Master Control line has always had the Master Moon, the Master Perpetual and later the Master Calendar. But this complete calendar was not to be found in the Reverso line for reasons unknown. I agree with your assessment of the smaller movement relative to the case. Do you have more information about the Caliber 843? I wonder if the base
And thank you for these very nice pics. I like this watch a lot: especially the totally symmetrical dial. I would need to try it on my wrist as I found so far that the GT size was for the best size for my not too big wrist … but as you said; it’s reasonable thickness and very nice proportions could make me change my mind about size. Most of the times I prefer RG versions but here thanks to its perfect and symmetrical dial; I tend to prefer the understated SS version. Thank you again for the revi
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