The GOLD TORNADO collection features the symbolic black brand color as well as red as its base colors, highlighted with brilliant gold color accents to deliver a look worthy of a special-edition 35th anniversary collection. All three models in the collection boast monolithic black bodies, with bright red on the back of the two-tone watch bands and the “SINCE 1983” on the watch face. Each model features gold ion plating on the main metal parts including the bezel, case, and screws, with gold color accents used extensively in other areas. Casio chose the color gold to symbolize the G-SHOCK heritage of constantly impacting the world by delivering new toughness in construction since day one, and the aspiration to maintain the brilliant presence which creates a buzz by producing astonishment and delight.The case backs of these models are engraved with the G-SHOCK 35th anniversary logo designed by Eric Haze, a world-renowned graphic artist, while the strap keeper is emblazoned with a star emblem that signifies 35 years. All three also come in special packaging with lavish use of gold color.
Shock resistant 200m water resistant Solar powered LED light (Super Illuminator) Afterglow Mobile link (Wireless linking using Bluetooth®) Dual time (Home city time swapping) 1-second stopwatch Measuring capacity: 23:59'59 Measuring mode: split time Countdown timer Measuring unit: 1 second Countdown range: 24 hours Countdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments) Daily alarm Battery level indicator Power Saving (hands stop to save power when the watch is left in the dark) Full auto-calendar (to year 2099) Date display Day indicator Regular timekeeping Analog: 3 hands (hour, minute (hand moves every 10 seconds), second), 3 dials (dual time hour and minute, dual time 24-hour, day) Accuracy: ±15 seconds per month (with no mobile link function) Approx. battery operating time: 5 months on rechargeable battery (operation period with normal use without exposure to light after charge) 24 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) module 5513 Size of case / total weight GST-B100D 58.1 x 53.8 x 14.1 mm / 185 g GST-B100 58.1 x 53.8 x 14.1 mm / 101 g