Automatic model

AT-40S Sports

The first Japan-made mechanical sports watch to meet the needs of modern times

In recent years, as business casual style has gained acceptance, Knot fans have been clamoring for a sports model. This is the result: an authentic made-in-Japan mechanical watch with water resistance up to 20 ATM.
Boasting a case thickness of 11mm, the slim profile of the sports model fits well under the sleeve and is suitable for wearing in business situations. Its beautiful mirror surface achieved through Sallaz polishing brings a dignified look to the wrist, and is a perfect match for suit style despite being a sports model.
From casual to business, this is a Japan-made mechanical sports model made for our times.

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Water resistant to 20 ATM for use in a wide range of settings

The watch’s water resistance makes it wearable in more situations, including when working near water, swimming, surfing, and other water activities. The crown features a screw-lock mechanism to prevent water ingress, while a crown guard enhances robustness.

* “20 ATM” means water resistance up to 20 atmospheres. The watch it is not a diving model and cannot be used for activities such as diving.
* The crown uses a screw-lock mechanism. Water resistance cannot be ensured unless the crown is firmly tightened. Turn the crown firmly while gently pushing inward until the crown stops.

Lights up continuously for five hours in the dark
Made with luminous paint manufactured by Nemoto & Co. Ltd., the luminous pigment provider with the largest market share in the world

Luminous paint is applied to the hour markers of the dial as well as the hour and minute hands for enhanced visibility in the dark. LumiNova® is a patented technology of Nemoto & Co. Ltd., a company that boasts a global market share of 80% and a domestic market share of almost 100% for luminous pigments. The world’s premiere luminous pigment, LumiNova® emits 10 times the brightness of conventional pigments and has more than 10 times the afterglow time. (Achieves 3mcd/m2, the standard for afterglow luminance visible in the dark after 5 hours)

Water resistant to 20 ATM for use in a wide range of settings

The watch’s water resistance makes it wearable in more situations, including when working near water, swimming, surfing, and other water activities. The crown features a screw-lock mechanism to prevent water ingress, while a crown guard enhances robustness.

* “20 ATM” means water resistance up to 20 atmospheres. The watch it is not a diving model and cannot be used for activities such as diving.
* The crown uses a screw-lock mechanism. Water resistance cannot be ensured unless the crown is firmly tightened. Turn the crown firmly while gently pushing inward until the crown stops.

Lights up continuously for five hours in the dark
Made with luminous paint manufactured by Nemoto & Co. Ltd., the luminous pigment provider with the largest market share in the world

Luminous paint is applied to the hour markers of the dial as well as the hour and minute hands for enhanced visibility in the dark. LumiNova® is a patented technology of Nemoto & Co. Ltd., a company that boasts a global market share of 80% and a domestic market share of almost 100% for luminous pigments. The world’s premiere luminous pigment, LumiNova® emits 10 times the brightness of conventional pigments and has more than 10 times the afterglow time. (Achieves 3mcd/m2, the standard for afterglow luminance visible in the dark after 5 hours)

A sporty bezel design, engraved for a satin finish

The bezel is engraved with a 60-minute/second scale.
The beautiful satin finish created by Hayashi Seiki Seizo Co. Ltd., the pinnacle of luxury watch case manufacturers in Japan, enhances the visibility of the engraving gives the watch a sporty twist.
The watch’s quality can be felt in the movement of the second hand, a unique high-beat movement that advances the hand in fine increments over the course of a second.

A sporty bezel design, engraved for a satin finish

The bezel is engraved with a 60-minute/second scale.
The beautiful satin finish created by Hayashi Seiki Seizo Co. Ltd., the pinnacle of luxury watch case manufacturers in Japan, enhances the visibility of the engraving gives the watch a sporty twist.
The watch’s quality can be felt in the movement of the second hand, a unique high-beat movement that advances the hand in fine increments over the course of a second.

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Styling

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Material

Movement

For the movement – the watch’s beating heart – Knot has adopted the Cal.9015 high-beat movement from CITIZEN MIYOTA, made in Japan. This high-beat movement oscillates 28,800 times per hour (8 times a second), reducing the distance of the swing of the second hand and drastically increasing the precision of the watch.
The Cal.9015 is a thin, high performance 8-beat movement, and the first mechanical movement to be revived by MIYOTA in 30 years. It has a thickness of just 3.9mm. The transparent back cover of the watch case allows the wearer to see the constant motion of the internal mechanical movement with their own eyes.

Sapphire glass

The crystal utilizes the same sapphire glass with anti-reflective coating found in luxury watches. The coating is on the inside of the glass, which increases the visibility of the watch face.

Specification

• Model number: AT-40S
• Number of jewels: 24
• Normal usage accuracy: average -10 seconds to +30 seconds per day (at room temperature: 5°C to 35°C)
• Features: 3 hands (hours, minutes, seconds), date
• Water resistance: 20 ATM
• Vibrations: 28,800 beats per hour (8 beats per second)
• Driving system: automatic with manual winding mechanism
• Power reserve: 42 hours
• Warranty period: 3 years for movement

PREMIUM STRAP

A selection of high-quality straps suitable for premium automatic models

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