The “ra” (螺) in Raden means “shell”, while “den” (鈿) signifies “inlay”. Raden is a beautiful
decorative technique where the shiny inner layer of mother-of-pearl is finely processed and scattered over the
surface of an “URUSHI” lacquer. This Japanese traditional craft was brought over from China in the Nara
period (710-794), refined during the Heian period (794-1185), and handed down the generations to the present
Two expressions of Raden: traditional Seven Colors and contemporary
2023 LIMITED MODEL
Limited edition model with classic brilliance
The Seven Colors model lets you enjoy the colors and splendor of traditional Raden inlay. The
Raden decoration is crafted from seawater shells lined with black mother-of-pearl. This inlay contains seven
shades of pink, green, white and more, creating a luxurious, distinctive look on the wrist. This model is only
available in limited quantities during the year 2023.
The Sumi Monochrome model features an arrangement of traditional Raden which is more subtle, and
ideal for wearing in everyday life. The simple color of the freshwater shell is refined to a sophisticated
shade using an original technique that tones down its saturation by applying a very thin coat of lacquer. This
innovative variation on the Raden technique lends it a contemporary feel.
Seven Colors limited edition and Sumi Monochrome regular edition Two models, two expressions of Raden
Seven Colors ATC-40 model（2023 limited）
Sumi Monochrome ATC-40model （regular edition）
Seven Colors AT-38 model （2023 limited）
Sumi Monochrome AT-38 model （regular edition）
The Raden decoration is arranged in an attractive gradient which transitions
from the center to the outer edge. This gradation has been refined by Knot’s product designers for optimum
readability of the hour markers, and hand crafted by traditional artisans. The colors and shapes are arranged
evenly, adjusting the color and size as the gradient transitions towards the edge. This intricate effect is a
result which can only be achieved by the skilled hand and intuition of a master craftsman.
Outstanding skills of traditional Aizu artisans
The “traditional artisan” title is only awarded to technicians working in
the manufacture of traditional crafts who possess advanced artisanal skills and techniques. The dial has been
realized in collaboration with Nobuichi Otake, a traditional artisan whose style employs sophisticated technical
skills and an original sense of style.
Nobuichi Otake, Traditional Artisan
Born in 1959 in Fukushima (the area formerly known as Aizu) Upon completing
high school, Nobuichi Otake initially worked at a hydroelectric power station. However, he had wanted to work
as a painter ever since he was a child. He happened to learn about the Maki-e lacquer art profession while
watching TV, and became an apprentice to Sone Takuo, a contemporary master artisan of Aizu
lacquerware. After five years and five months as an apprentice, he became an independent Aizu lacquerware
After filtering to remove any impurities, lacquer is applied to the dial so
that the shell pieces can adhere to it. This must be done evenly and with the right thickness, since this will
determine the final result.
The shells are crushed into small pieces before being distributed over the
dial, all entirely by hand. The shiny inner layer of the finely processed shell is carefully crushed into
small and medium-sized pieces.
3.Distribution of shell pieces
Shell pieces of different colors and shapes are applied in a balanced manner
according to the craftsman’s intuition. The color and shape of the shell pieces are adjusted to create a
gentle gradient from the center, before finally sprinkling with fine flakes using a powder tube.
The lacquer is applied again to cover the distributed shell pieces. This fills
in the gaps between the shell pieces to create a Raden where the shell pieces and lacquer shine as a uniform
After the layers of lacquer have thoroughly dried, the surface is polished so
that the shell pieces can shine in their full glory. Through this process, the lacquer and shell pieces become
smooth and shine as one. Too much polishing can cause the shell pieces to chip, so this is a highly delicate
process carried out with a craftsman’s touch.
6.Color and lacquer adjustment
This process is only applied to the Sumi Monochrome dial. Normally, no color is
applied on top of the shell pieces. However, to achieve Raden monochrome shades, the lacquer is gradually
smoothed in a careful process to adjust its saturation, which is then polished to produce the subdued, radiant
Sumi Monochrome effect.
Case finished with the advanced Sallaz mirror
polishing technique from Hayashi Seiki Seizo, exclusive to the Premium Automatic Series
Sallaz mirror polishing is an advanced finishing technique which produces a beautiful
flat surface with clean edges and zero distortion. There are very few craftsmen who are able to apply Sallaz
mirror polishing, which makes it a rare and precious sight. The name “Sallaz” was originally derived from Swiss
processing equipment, but it is now only found in high-end Japan-made watches. The ability to give different looks
to the same material by carefully polishing each part is a highly sophisticated technique performed exclusively by
the experienced technicians at Hayashi Seiki Seizo.
The model based on the three-hand AT-38 has a see-through case back which
allows you to observe the movement of the Japanese-made high-beat movement.
※Please note that the ATC-40
chronograph model does not have a see-through back.
The watch is presented in a box exclusive to the Premium Automatic Series and
in a special Raden inlay sleeve (the limited edition and regular edition both have the same package). The top of
the box is decorated with an original plate befitting of the Premium Automatic series, engraved with the Knot
logo, and an original watch cloth is also included.
The Seven Colors models are numbered, signifying their
The case is laser engraved with a limited edition serial number between the
lugs at 6 o’clock. The limited edition model is further enhanced by the customization uniquely offered by Maker’s
Watch Knot, allowing the watch and strap to be reconfigured to your desire.
In combination with the striking presence of the Raden dial, a premium strap
with solid thickness and luxurious feel is a great match. Cordovan straps develop a unique texture the longer they
are used, enhancing premium watches even further in their appearance and quality.
THE JAPAN COLLECTION
Special automatic model in collaboration with Japanese craftsmanship
Standard automatic model line up suitable in various situation.