GA-900-1A

The Casio G-Shock GA-900-1A is a rugged, analog-digital heavy-duty watch designed with an industrial, “work-style” aesthetic. It stands out in the G-Shock lineup for its massive 7-year battery life and distinctive 10-sided nut-shaped bezel.

Key Design Features

Industrial Motif: Features a bold, 10-faceted resin bezel secured by four prominent accent screws, mimicking mechanical nuts and bolts.

Enhanced Operability: The major function buttons, case sides, and resin strap lugs are detailed with a checkered, non-slip texture to provide an excellent grip.

High Contrast Dial: Uses high-visibility bold analog hands paired with digital graphics and minimal LCD layouts for reliable visibility on job sites or city streets.

Technical Specifications

Case Dimensions: 52.8 × 49.5 × 16.9 mm.

Weight: 65 grams.

Battery: Approximately 7 years on a single CR2016 coin cell.Water Resistance: 200 meters (20 Bar), ideal for swimming and recreational water activities.Durability: Standard G-Shock shock-resistant construction built to handle impacts and vibration.

Core Functions

World Time: Tracks 31 time zones spanning 48 cities, complete with daylight saving settings and home-city swapping.

Stopwatch: 1/100-second timing capacity up to 24 hours, including a target time alarm and one-touch direct timing start.

Countdown Timer: Measures up to 60 minutes in 1/10-second intervals.

Alarms: 5 daily independent alarms, featuring 1 snooze option, plus an optional hourly time signal.

Illumination: White Super Illuminator LED with a customizable 1.5-second or 3-second afterglow window.

Hand Shift Feature: Clears the analog hands out of the digital window’s line of sight at the touch of a button.