B640WB-1A This Casio Vintage model features a black ion-plated stainless steel band with a black resin case and a grey digital display for a clean retro-inspired look. Built with resin glass and 50-meter water resistance, it offers a slim lightweight profile suited to dependable everyday wear. Confirmed functions include LED backlight with afterglow, a 1/100-second stopwatch, countdown timer, daily alarm, hourly time signal, auto-calendar, and flash alert, making it a practical choice for users who want classic digital utility with a darker vintage finish.