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Black and blue ana-digi G-Shock watch with resin band and stainless steel case, 51mm wide

CASIO

Casio G-Shock GA100CB-1A Black and Blue Ana-Digi Watch

SKU CH-K89S-THQAR

A shock-resistant ana-digi sports watch with 200 m water resistance, world time across 29 zones and 48 cities, a 1/1000-second stopwatch, countdown timer.

  • Watch movementQuartz
  • Watch face colorMulticolored
  • Display typeAnalog
  • Date displayDate
  • Strap length8
  • Closure typeBuckle
  • Shock-resistant construction protects against heavy impacts
  • 200-metre water resistance suits diving and swimming
  • World time covers 29 zones across 48 cities
  • Auto LED light with afterglow ensures night visibility
  • 1/1000-second stopwatch and countdown timer for precise timing

Shock-Resistant Ana-Digi Sports Watch

The Casio G-Shock GA100CB-1A is a men's sports watch built with a 49 mm stainless-steel case and a resin band that fastens with a buckle. Quartz movement drives an analog-digital dial showing the date, while the 8-inch band length can be resized for adult wrists. It ships new in the original box with the instruction booklet.

200-Metre Water Resistance and Magnetic Shielding

The case is rated for 200 m water resistance and includes magnetic resistance, so the movement stays accurate during swimming, surface water sports or daily exposure to electromagnetic fields. An auto LED light with afterglow activates in low light, and a button-operation tone can be muted for silent use. A single CR1220 battery powers all functions.

World Time Across 29 Zones

The module covers 29 time zones across 48 cities plus UTC, with city-code display and daylight-saving on/off switching. Timing tools include a 1/1000-second stopwatch, a countdown timer, five daily alarms with one snooze alarm, and an hourly time signal. Both 12-hour and 24-hour formats are selectable. Builders who need a second timepiece for a different strap style or buyers who want more storage for apps will not find those features here.

How it compares

Measured against everything we stock in Analog & Digital Wristwatches, at today’s prices. Recalculated every night.

Price $91.99
Cheaper than about 60% of the 2,679 comparable items (median $130.99).

Specifications

Product
Brand nameCASIO
Design styleSport
Product colorMulti
Watch face colorMulticolored
Item conditionNew
Display
Display typeAnalog
Size & build
Main materialPlastic
Size adjustmentYes
Strap length8
Closure typeBuckle
Case size49
Housing materialStainless Steel
Environment & compliance
Water resistanceYes
More details
Watch movementQuartz
AdjustabilityYes
Date displayDate
Suitable forMen
Age groupAdult
Alarm functionYes

Questions about this item

Does the 1/1000-second stopwatch and 200M water resistance add any noticeable bulk or heat to the 51mm case?

The 51mm resin case weighs 56G and uses a CR1220 quartz movement, so there is no heat and the profile stays slim for all-day wear.

Will I need any extra tool or phone app to set the 29 time zones and 5 daily alarms?

All world-time, alarm and timer functions are controlled by the four case buttons; no phone, cable or special tool is required.

Can the 49mm stainless-steel case back and resin band fit alongside a vintage metal bracelet without scratching?

The resin band and buckle sit flush against the 49mm case, so they won’t mar an adjacent metal bracelet during daily wear.

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