Casio limited out of production SAN-100H-7BJR Japan release only Sauna Watch

Sauna-Friendly Dial A simple, easy-to-read dial with luminous hands for dim sauna environments. No need to remember when you started — your personal 12-minute timer is always on your wrist. Sauna-Specific Heat-Resistant Design Designed specifically for sauna use, this watch uses a heat-resistant battery newly adopted by CASIO. Its internal structure minimizes heat transfer to key components, ensuring stable operation even in high-temperature environments. Thoughtfully Designed Exterior Components To prevent burns, all exterior parts are made of resin — avoiding metal components wherever possible. The only metal screw is positioned on the case back, and the case is carefully shaped to minimize direct skin contact. Additionally, a low-moisture-permeable resin is used to help reduce internal fogging, ensuring safe and comfortable use even in demanding sauna conditions. Display Functions Regular timekeeping (Hour / Minute), 12-minute timer (Minute / Second), Reset function Water Resistance 50-meter water resistance Size / Weight 40.2 × 35.4 × 12.9 mm (L × W × H) / approx. 25g Battery Heat-resistant battery (approx. 5-year life) Suitable Environment Designed for sauna use (up to 100°C / 212°F) for a maximum of 15 minutes per session when worn on the wrist.  NIB, battery is good and watch runs Functional and a flawless collectors piece.