[Introduction] CASIO G-SHOCK G-STEEL Tough Solar wristwatch with Bluetooth (Mobile Link), model GST-B100 (module 5513), serial 0220543665. This full metal G-STEEL features a powerful industrial bezel design with “G-SHOCK / SHOCK RESIST” engraving, a multi-layer analog dial with subdials, and a date display, offering premium wrist presence with G-SHOCK-level toughness. [Historical & Collector Value] The G-STEEL line is highly regarded for combining the shock-resistant DNA of G-SHOCK with stainless-steel construction and a more premium finish. The GST-B100 series is especially popular for Tough Solar charging and Bluetooth connectivity, making it a modern, highly usable G-SHOCK that appeals to both collectors and daily users. Specifications ◇ Brand: Casio ◇ Line: G-SHOCK G-STEEL ◇ Model: GST-B100 ◇ Module: 5513 ◇ Serial number: 0220543665 ◇ Movement: Tough Solar (solar quartz) ◇ Functions: Time, date, multi-function subdials, Bluetooth (Mobile Link) ◇ Case/Bezel: Stainless steel (G-STEEL) ◇ Bracelet: Stainless steel ◇ Water resistance: 20 BAR ・Condition Good condition with signs of use. The case, bezel, and bracelet show surface wear consistent with normal use. Dial and hands remain clean and clear. ・Service History The watch has been checked for operation and is functioning at the time of listing. Depending on storage and usage, the rechargeable power cell may require replacement in the future. Future maintenance may be required depending on usage and buyer standards. ・Shipping & Customs Ships from Japan. Carefully packed and protected for transit. International shipping available. Customs duties and taxes are the buyer’s responsibility.