Casio G-Shock GA900-1A Analog Digital Alarm Black Resin Band

The Casio G-Shock GA-900-1A is engineered for utility with industrial design cues and a rugged build. This analog-digital hybrid is part of G-Shock’s workwear-inspired Industrial Series, drawing influence from mechanical gear aesthetics and power tools. The bold case measures 52.8mm wide and 16.4mm thick, built from a combination of resin and mineral glass, with metal screws exposed on the bezel for a bolted-on, utilitarian look.

Powered by a quartz movement, the GA-900-1A is rated for 200 meters of water resistance, suitable for both work environments and water-based activities. A standout feature is its extended 7-year battery life, an uncommon spec for models in this category, ensuring long-term reliability without frequent maintenance.

The dial layout balances functionality and readability, with large hands coated in luminescent paint and a negative LCD display for added digital functions. These include world time (31 zones, 48 cities), 1/100-second stopwatch, countdown timer, 5 daily alarms, hourly time signal, full auto-calendar, and 12/24-hour formats. The button guard and knurled texture on the rotary-style front button add grip and reinforce the tool-inspired motif.

The strap is a structured black resin band that integrates seamlessly into the case, secured with a buckle closure. For those requiring durability, legibility, and feature-rich performance in extreme environments, the GA-900-1A delivers a practical, hardened aesthetic that aligns with its industrial function.