Introduction: Casio's G-SHOCK line needs little introduction among collectors of tool watches, having built its reputation since the early 1980s on shock resistance, legibility and genuinely hard-wearing construction. This GG-B100 belongs to the Mudmaster family, the branch of the range developed for dusty, muddy and vibration-heavy environments, where sealed buttons and a heavily protected case are the defining idea. It presents a round case in stainless steel paired with a resin band, a black dial and an analogue-digital layout that combines traditional hands with a digital window, plus day-date and chronograph functions. The Bluetooth connectivity links the watch to a smartphone, and the solar movement keeps running without routine battery changes. A practical choice for outdoor use, travel and anyone who prefers Condition Report: Status: [ Working ] (All basic functions, including crown operation, have been checked and work properly. Keeping time at the time of listing.) Cosmetic: Overall Rank B (excellent pre-owned condition with only minor signs of use). Specs: Brand: CASIO Case Size: approx. 52.5 mm (excluding crown) / Length approx. 51.0 mm Wrist Size: Up to approx. 21.0 cm (8.27 inches) max Material: Stainless Steel Band: Resin Movement: Solar with Day-Date Chronograph Dial: Black dial Reference: G-SHOCK / SGG-B100 Calibre: Cal.5594 Gender: Men's Era: 2010-2020 Maintenance: Cleaned and sanitized. Accessories: Box, Manual, Papers Internal Ref:26-1551 Shipping: Your item will be carefully packed with protective cushioning and secure outer boxing. We ship from Japan within 3 business days of payment via DHL Express, FedEx or Japan Post with online tracking. Customs and Taxes: This item will be shipped from Japan. Please be aware that your country of residence may impose customs duties and import taxes. These additional charges are the sole responsibility of the buyer. Customs policies vary widely from country to country, so we recommend contacting your local customs office for specific information. Search tags/terms; Casio, G-Shock, Casio G-Shock, 5594, SGG-B100, SGGB100, men's watch, 2010s, stainless steel, black dial