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

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The Discussion
AR
Arronax
Jan 17, 2026

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

VI
vitalsigns
Jan 17, 2026

How thick is the case in total?

QU
quattro
Jan 17, 2026

What a wonderful true Ultra-Plate watch, with several little details which make it special: the JLC movement and the Chaumet box, in particular. And the classy Breguet DNA, of course! Wear it in the best of health (and, knowing the pain you endure, I weigh my words). Best, Emmanuel

CO
COUNT DE MONET
Jan 17, 2026

I am sure 33 mm in this lovely watch will look like 36 mm. How high is the watch? You said over 2 mm, but you meant the movement, I suppose?

MA
Marc Obermann
Jan 17, 2026

1 cm scale showing just over 2 mm 1 cm scale showing just over 2 mm P2 Marc

MA
Marc Obermann
Jan 17, 2026

Slightly better now after some injections, so I am going to try and post the Ultra Thin posts I keep promising to do. Marc

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