[Introduction] The Casio G-Shock G-Steel GST-B100 is a robust and technically advanced timepiece that perfectly blends the legendary toughness of G-Shock with a sophisticated metal aesthetic. This "Tough Solar" model features a multi-layered guard structure and a striking analog display, highlighted by the iconic rotating turbine sub-dial inspired by jet engine blades. Equipped with Bluetooth connectivity, it offers seamless time synchronization and functionality via smartphone, making it a powerful tool for the modern lifestyle. Its full stainless steel bracelet adds a premium, industrial feel that transitions effortlessly from rugged outdoor use to a professional environment. [Historical & Collector Value] As part of the G-Steel evolution, the GST-B100 holds a special place as the first model in the series to achieve a fully analog chronograph layout while incorporating a "Connected" engine. Collectors value this reference for its bold architectural design and the mechanical intrigue of its functional turbine indicator. The integration of high-grade stainless steel with resin components reflects G-Shock's modern era of elevated durability. This specific variant, featuring the full metal bracelet, is particularly sought after for its substantial wrist presence and high-end feel within the G-Steel lineup. Specifications ◇Brand: Casio ◇Model: G-Shock G-Steel ◇Reference: GST-B100 ◇Case size: 53mm ◇Movement: Tough Solar (Solar Powered) ◇Case material: Stainless Steel and Resin ◇Dial: Black ◇Crystal: Mineral Glass ◇Functions: Bluetooth Smartphone Link, Chronograph, Date, Alarm, Battery Level Indicator, Dual Time, LED Light ◇Bracelet / Strap: Stainless Steel Bracelet ◇Clasp: Fold-over clasp with push-button release ◇Water resistance: 20 bar ◇Country of manufacture: Japan (Movement) ・Condition Well preserved condition with signs of normal use. The stainless steel bezel, case, and bracelet show surface marks and light scratches consistent with regular wear. The crystal remains clear and the dial is in excellent condition. ・Service History The watch has been checked for basic operation and is functioning at the time of listing. As a Tough Solar model, it is currently charging and maintaining power through light exposure. Future maintenance may be required depending on usage and the buyer’s standards. ・Shipping & Customs Ships from Japan, carefully packed. International shipping available. Customs duties/taxes are the buyer’s responsibility.