Introduction: Casio's G-SHOCK line needs little introduction among tool-watch enthusiasts, and the FROGMAN sits at its summit as the brand's dedicated ISO-rated diver's platform, developed in Japan and long favoured by divers and rescue professionals. This example, built on module 3521, pairs an asymmetric round titanium case with a resin band, combining genuine lightness with the shock resistance the series is named for. The digital display is rendered in a striking yellow green against black, a colourway that nods to the poison dart frog theme associated with FROGMAN releases and keeps readability high in poor light. Solar charging removes routine battery concerns, while day-date and chronograph functions cover everyday timing needs. It suits collectors of Japanese tool watches and anyone wanting a rugged, low-maintenance companion. 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. 48.1 mm (excluding crown) / Length approx. 47.1 mm Wrist Size: Up to approx. 22.0 cm (8.66 inches) max Material: Titanium Band: Resin Movement: Solar with Day-Date Chronograph Dial: Yellow Green / Black dial Reference: G-SHOCK / FROGMAN / 3521 Gender: Men's Maintenance: Cleaned and sanitized. Accessories: Box, Manual, Papers Internal Ref:26-1480 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, 3521, solar, men's watch, 2020s, titanium, black dial