Casio G-Shock Men’s Analogue Digital Watch World Time GA-100B-4AER


  • Casio G-Shock Men’s Watch
  • Dual Analogue/Digital Display
  • Model Number: GA-100B-4AER


In stock

SKU: GA-100B-4AER-1621 Category: Tags: , , , ,


Introducing a collection of new G-SHOCK models whose large cases give them a look of power and strength. Dial rings and raised hour markers also create three-dimensional depth that gives the face plenty of character. These watches are designed and engineered to deliver outstanding shock resistance, are 200m water resistant, and anti-magnetic. The GA-100B-4AER is beautifully finished in red with white accents, a reverse LCD display and a red resin strap for a distinctive look.

Over-sized buttons come with a checkered anti-slip surface to make operations fast and sure.

  • Accuracy: +/- 15 seconds per month
  • Alarm function: 5 daily alarms – each will sound every day at the time you set, hourly time signal: the watch beeps every hour on the hour, snooze function
  • Auto calendar: Once set, the automatic calendar always displays the correct date
  • Average speed display: A dial on the watch face displays your average speed travelled over a set distance
  • Battery life: Approximately 2 years
  • Case material: Resin/ stainless steel
  • Countdown timer function: Countdown range – 24 hours, measuring unit: 1 second
  • Date and weekday display: The current date and week day are displayed on the watch face
  • Date display: The current date is displayed on the watch face
  • Dimensions: 55.0 x 51.2 x 16.9mm
  • Display illumination auto light: The watch face will illuminate automatically when you tilt your wrist towards you. Once activated, this feature will automatically deactivate after six hours., led light, selectable illumination duration (1.5 seconds or 3 seconds)
  • Lap memory: 100 records
  • Low temperature resistant: -10 °c/ 14°f
  • Magnetic resistance: The case has been specially mounted to be shielded from magnetic fields.
  • Mineral glass: Hard glass resists scratching
  • Shock resistant: Patented hollow core guard structure protects against impact and vibration
  • Stopwatch function: Measuring capacity: 100 hours, measuring modes: elapsed time, split time, measuring unit: 1/1000th second
  • Total weight: 70g
  • Vibration resistant: Resistant against vibration from heavy duty operations
  • World time: Displays the current time in major cities and specific areas around the world

The ruler in the photo is to give a sense of scale of the dial/case, we have given detailed dimensions for everything else in the table above. If you feel something is missing please message us and ask!

This item is in used condition and does show minor signs of wear. All used watches are cleaned, with fresh batteries as standard and quality replacement parts fitted where appropriate before sale. We cannot guarantee that a used watch is still waterproof to the depth marked on the case.

All used watches available on our website are covered by a limited warranty for 3 months from the date of purchase. Terms, conditions and exclusions apply. » More Information

Additional information


Case Shape


Case Width Approx.


Band Colour


Band Material


Band Type

Two-Piece Strap

Dial Colour





Alarm, Backlight, Chronograph, Date Indicator, Day Indicator, Dual Time, Shock Resistant, Stopwatch, Timer, World Time



Movement Type

Quartz (Battery)

Water Resistance

200m (20 ATM)