Fortis

S-41 Blue Japan

Reference Number :

F2340010

Series : Stratoliner

Retail: $5,150

(As of: 04/2025)

This watch is not for sale, this page is just for reference purposes only. If you would like to purchase this watch, please contact Fortis. If you are interested in selling this watch to us, you can contact us here.

Quick TakeForget your average tool watch, the Fortis Stratoliner S-41 Blue Japan edition isn't just built tough, it's literally been to space (well, its movement has!). Encased in a solid 41mm recycled steel body that feels purposeful at 98 grams, it boasts a serious 200m water resistance thanks to that triple-gasket screw-down crown and FKM seals – ready for anything terrestrial. But look closer: the Blue Japan Stardust dial isn't just a color, it's a tiny galaxy on your wrist, complete with Superluminova X1 markings that glow blue like distant nebulae. Inside beats the heart of an adventurer: the Werk 17 manufacture chronograph calibre, a chronometer-grade powerhouse with a 60-hour reserve and the satisfying mechanical feel of a column wheel. The red-accented chrono hand adds a pop of mission control urgency. Mounted on the sturdy Block Bracelet with its clever micro-adjust clasp, this Stratoliner is equal parts precision instrument and cosmic explorer, blending rugged functionality with a uniquely celestial aesthetic. It's a conversation starter that's backed by serious engineering.

DescriptionReference F2340010 designates the Fortis Stratoliner S-41 Blue Japan model, a timepiece characterized by specific engineering and material choices. The primary case structure utilizes recycled stainless steel and presents a diameter measurement of 41 millimeters. Its geometry includes a lug-to-lug distance specified as 50.5 millimeters and a total vertical height of 14.5 millimeters. Designed for aquatic environments, the case achieves a water resistance rating certified to 20 atmospheres, which corresponds to 200 meters or 600 feet. This level of resistance is supported by the implementation of Performance FKM gaskets and a screw-down crown assembly incorporating a triple gasket system for enhanced sealing. The bezel configuration is identified as a Flat Orbit Bezel type. Viewing the movement is facilitated by a case back made of smoked sapphire crystal, featuring a distinctive element referred to as a space window. Protecting the dial surface is a sapphire crystal piece, enhanced with anti-reflective coating applied to both its internal and external surfaces to ensure optimal clarity under various lighting conditions. Operation of the chronograph functions is managed via quickset pushers integrated into the case flank. The watch head, without the bracelet, has a documented weight of 98 grams.

Powering the Stratoliner S-41 is the Calibre Werk 17, an automatic manufacture movement that has undergone verification through space testing protocols. This mechanical heart delivers chronograph functionality executed via a column wheel mechanism and includes both day and date indications as standard complications. The fully wound mainspring provides a power reserve lasting approximately 60 hours. Performance regulation adheres to chronometer specifications, ensuring a high degree of timekeeping accuracy. Visually, the watch features the Blue Japan Stardust Dial, distinguished by gray Space-Travel Markings treated with Superluminova® X1 luminescent material. This specific compound, Superluminova® X1, emits a blue glow in low-light conditions for legibility. The primary hour and minute hands are rendered in a black metallic finish and contain Superluminova® X1. A notable detail is the central sweep second hand, which features a red center portion complemented by white Superluminova® X1 application. The hands indicating chronograph measurements on the subdials maintain the black metallic finish. Attachment to the wrist is accomplished using the Block Bracelet, constructed, like the case, from recycled stainless steel. This bracelet utilizes a screw pin system for link mounting and secures with a stainless steel slide clasp that incorporates an integrated microadjustment system for fine-tuning the fit.

GenderMen

SignaturesFortis

Country of OriginSwitzerland

Case Size41 mm

MovementAutomatic

CaliberWerk 17

FunctionsChronograph, Hours, Minutes, Seconds, Date, Day

Power Reserve60 Hours

Case MaterialsStainless Steel

Bezel MaterialsStainless Steel

Lug MaterialsStainless Steel

Case BackSapphire Crystal