Breguet Classique 4605/3015BA Ultra Plate Arrives
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Breguet Classique 4605/3015BA Ultra Plate Arrives

By Marc Obermann · Jan 17, 2026 · 37 replies
Marc Obermann
WPS member · Breguet forum
37 replies1791 views8 photos
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Marc Obermann's acquisition of the Breguet Classique 4605/3015BA Ultra Plate offers a rare glimpse into a specific era of Breguet's history, marked by exceptional thinness and unique collaborations. His detailed examination highlights why this particular reference stands out, inviting collectors to appreciate the subtle yet significant details that define true horological artistry. This article delves into the nuances that make this timepiece a special find, particularly for those interested in Breguet's historical context and ultra-thin movements.

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Breguet Classique Ultra Plate

As you can see my new to me Breguet Classique Ultra Plate 4605/3150BA has arrived super fast as I only completed the purchase yesterday morning I consider this to actually be quite a special Breguet for a few reasons. The first and most obvious is the fact that it is truly an Ultra Plate whilst most Breguet's of this time period are usually around 5.5mm thin this one is just a fraction over 2mm and the case is 33mm and it also comes on a an unbranded deployant that has French hallmarks which IMO either came from Cartier or is a close to a Cartier deployment as possible. The next thing that makes this watch quite unusual/special IMO is that it was delivered in October 1986 to Chaumet and comes in a Co branded box and of course with it being from 1986 it comes from the time when Daniel Roth was at Breguet. The last thing that sets this watch apart from some of the others and again IMO makes it special is the fact that it is powered by the famous Jaeger-LeCoultre manual wind Cal 839 Ultra thin movement that is signed Breguet. Being a Breguet Classique Ultra Plate watch it is a two handed time only watch and features a beautiful hand engraved guilloche dial, coin edge case and blued Breguet hands as well as a sapphire cabochon crown. Unfortunately the strap is way too big for me so I will need to order a custom Molequin Oxford Blue Saffiano strap for the deployant clasp which means I won't be able to wear it right now but just admire it.

What is a post without some pretty pictures so here are some.
  





Breguet Classique Ultra Plate




Breguet Classique Ultra Plate crown side




Breguet Classique Ultra Plate caseback




Breguet Classique Ultra Plate movement




Chaumet/Breguet box




Unbranded Deployant




Breguet Classique Ultra Plate comparison to Boucheron la Carree Ultra Plate


Marc

About the Breguet Classique Ultra Plate Ref. 4605/3015BA

The Breguet Classique Ultra Plate represents the contemporary evolution of Abraham-Louis Breguet's original aesthetic philosophy, maintaining the brand's signature design codes while embracing modern ultra-thin construction. The 4605 reference sits within Breguet's core Classique collection, which has served as the foundation of the manufacture's offerings since the brand's revival under the Swatch Group. This particular execution demonstrates Breguet's commitment to classical proportions and traditional guilloché work that has defined luxury watchmaking for over two centuries.

The technical achievement of the Ultra Plate lies in its remarkably thin profile, achieved through careful movement architecture and case construction. The engine-turned dial displays Breguet's characteristic guilloché patterns, executed on rose-engine lathes that create the intricate geometric textures. The open-tipped Breguet hands and Arabic numerals follow the design language established by the founder, while the fluted case band and welded lugs demonstrate modern manufacturing precision. The automatic movement within maintains the brand's standards for finishing and reliability while achieving the slim proportions demanded by contemporary dress watch aesthetics.

In today's market, the Classique Ultra Plate occupies a crucial position as an accessible entry point into Breguet's world of haute horlogerie. The yellow gold case and classical styling appeal to collectors seeking traditional luxury without the complications that drive prices significantly higher in Breguet's catalog. While not possessing the same collectible cachet as vintage Breguet pieces or contemporary grand complications, the Ultra Plate serves as a solid foundation piece that demonstrates the brand's core competencies in case construction, dial work, and movement decoration.

Specifications

Case
yellow gold
Diameter
39mm
Dial
silver

Key Points from the Discussion

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The Discussion
SA
SALMANPK
Jan 17, 2026
Congratulations! A Very Pure Watch with an Interesting History 😊👍

MA
Marc Obermann
Jan 17, 2026
Thanks for your kind words glad you found it interesting

Marc

AR
Arronax
Jan 17, 2026
what an amazing find

Had never seen it before, thanks for the education and lovely pics!

MA
Marc Obermann
Jan 17, 2026
Thank you for your kind words and glad you enjoyed the pictures and the information.

Marc

OR
orahu
Jan 17, 2026
That is a beauty! Your added context about the watch was very helpful! Congratulations!

MA
Marc Obermann
Jan 17, 2026
Thank you for your kind words and glad you found it helpful.

Marc

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