Modern, refined, and mechanically upgraded, the Citizen Tsuyosa NK0020-55E introduces a new chapter in the popular Tsuyosa collection. This latest generation is powered by Citizen’s new in-house Calibre 8310 automatic movement, delivering an impressive 60-hour power reserve — perfect for leaving the watch off over the weekend without missing a beat.
Visually, the watch is elevated by a richly detailed guilloché-style black dial, offering added depth and elegance while maintaining the clean, contemporary Tsuyosa aesthetic. The 40 mm stainless-steel case is slim and well-proportioned, complemented by a comfortable multi-link stainless-steel bracelet that enhances flexibility on the wrist. A sapphire crystal with magnifier protects the date window, while luminous hands and indices ensure excellent legibility.
A transparent case back reveals the new movement in action, and the crown positioned at 4 o’clock contributes to a streamlined silhouette and improved wearing comfort. With 5 bar water resistance, this Tsuyosa is designed to move effortlessly from work to everyday wear.
Specs at a glance:
Movement: Citizen automatic (Calibre 8310)
Accuracy: –20 / +40 seconds per day
Power reserve: Approx. 60 hours
Case size: 40 mm diameter × 11.7 mm thick
Case material: Stainless steel
Crystal: Sapphire glass with date magnifier
Dial: Black guilloché-style with baton indices
Strap: Stainless steel multi-link bracelet with double-secured push clasp
Water resistance: 5 bar (50 m)
Weight: 141 g
Features: Date display, luminous hands & indices, exhibition case back
A confident, contemporary automatic watch — combining Citizen’s mechanical innovation with refined everyday design.
