











843Σ︎
Yosuke Sekiguchi
Ref. 39RG-BKWH
Primevère 2023
A rare and magnificent artisanal pink gold wristwatch with small seconds, black grand feu enamel dial, certificate and presentation box
Estimate
HK$500,000–1,000,000
€54,500–109,000
$64,100–128,000
Live 30 May, 12 PM Hong Kong SAR China Time
Manufacturer
Yosuke Sekiguchi
Year
Circa 2025
Reference No
39RG-BKWH
Movement No
25
Case No
18
Model Name
Primevère 2023
Material
18K pink gold
Calibre
Manual, cal. YS-Y01, 23 jewels
Bracelet/Strap
Crocodile
Clasp/Buckle
18K pink gold Yosuke Sekiguchi pin buckle
Dimensions
39.5mm diameter
Signed
Case, dial, movement and buckle signed
Accessories
Accompanied by Yosuke Sekiguchi certificate signed Yosuke Sekiguchi dated 8th January 2025, travel pouch, cloth, fitted presentation box and outer packaging.
Full-Cataloguing
Good to know:
- Modern interpretation of 19th century Jules Jürgensen pocket watches and movement
- Movement designed and made by himself in his own atelier
- Incredibly made black grand feu enamel dial
Japanese born now Switzerland resided watchmaker Yosuke Sekiguchi is a rising star in the independent watchmaker category. Leaving Japan at the age of 23, he flew to France and attempted to enroll in the watchmaking school in Morteau, which would be the first step of pursuing his dream to be a watchmaker in Switzerland. Due to administrative reasons, he was not able to enroll, but fortunately with the help of his friend at the watchmaking school, he learnt watchmaking by having his friend to show him the lessons and coursework. Manufacture La Joux-Perret hired Sekiguchi despite not graduating from the school, granting him a working visa, where he mostly worked on split-seconds, foudroyante and tourbillon. He later moved to Christophe Claret, specializing in assembling and repairing complicated watches, and worked at Juval Horlogerie in repairing and restoration.
In 2020 his brand was launched officially, becoming an independent watchmaker. Prior to the launch he had had experience in building a detent escapement tourbillon pocket watch from scratch and restored his own Jules Jürgensen wristwatch, perhaps under the influence of those watches and 19th century horology pieces, his debut watch the Primevère shows resemblance of historic timepieces. When he was designing the Primevère, he deconstructed his Jules Jürgensen, originally a pocket watch and now cased into a wristwatch, redesigning it in a modern context. The modern interpretation of the Jürgensen calibre with all components of the movement made by hand in his atelier is the reflection of his skills and passion in watchmaking.
The present Primevère, in pink gold case, is fitted with a black grand feu enamel dial. The layout of the dial in Roman numerals is a tribute to his Jules Jürgensen, now with a black dial gives a nice touch of modernity yet preserves the essence of traditional fine watchmaking. Another interesting detail is the flower-shaped monogram at the rear of the lugs, composed of three hearts and letter “S” for Sekiguchi’s name, which symbolizes family, tradition and a new beginning.
With only 20 watches made each year, Yosuke Sekiguchi focuses more on quality rather than quantity. Every piece is finished by Sekiguchi with his utmost care and passion. Rarely seen in auction, this Primevère is a rare opportunity to appreciate the fine craftsmanship of a new generation of independent watchmakers.
- Modern interpretation of 19th century Jules Jürgensen pocket watches and movement
- Movement designed and made by himself in his own atelier
- Incredibly made black grand feu enamel dial
Japanese born now Switzerland resided watchmaker Yosuke Sekiguchi is a rising star in the independent watchmaker category. Leaving Japan at the age of 23, he flew to France and attempted to enroll in the watchmaking school in Morteau, which would be the first step of pursuing his dream to be a watchmaker in Switzerland. Due to administrative reasons, he was not able to enroll, but fortunately with the help of his friend at the watchmaking school, he learnt watchmaking by having his friend to show him the lessons and coursework. Manufacture La Joux-Perret hired Sekiguchi despite not graduating from the school, granting him a working visa, where he mostly worked on split-seconds, foudroyante and tourbillon. He later moved to Christophe Claret, specializing in assembling and repairing complicated watches, and worked at Juval Horlogerie in repairing and restoration.
In 2020 his brand was launched officially, becoming an independent watchmaker. Prior to the launch he had had experience in building a detent escapement tourbillon pocket watch from scratch and restored his own Jules Jürgensen wristwatch, perhaps under the influence of those watches and 19th century horology pieces, his debut watch the Primevère shows resemblance of historic timepieces. When he was designing the Primevère, he deconstructed his Jules Jürgensen, originally a pocket watch and now cased into a wristwatch, redesigning it in a modern context. The modern interpretation of the Jürgensen calibre with all components of the movement made by hand in his atelier is the reflection of his skills and passion in watchmaking.
The present Primevère, in pink gold case, is fitted with a black grand feu enamel dial. The layout of the dial in Roman numerals is a tribute to his Jules Jürgensen, now with a black dial gives a nice touch of modernity yet preserves the essence of traditional fine watchmaking. Another interesting detail is the flower-shaped monogram at the rear of the lugs, composed of three hearts and letter “S” for Sekiguchi’s name, which symbolizes family, tradition and a new beginning.
With only 20 watches made each year, Yosuke Sekiguchi focuses more on quality rather than quantity. Every piece is finished by Sekiguchi with his utmost care and passion. Rarely seen in auction, this Primevère is a rare opportunity to appreciate the fine craftsmanship of a new generation of independent watchmakers.