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Comparison · Reviewed

GA-2100 vs DW-5600: Octagonal CasiOak or Classic Square?

Verdict

Choose the GA-2100 for analog hands, an octagonal bezel and a thinner 11.8 mm case; choose the DW-5600 for the original all-digital square look at a lower list price.

GA-2100 vs DW-5600 side by side

Casio's specifications for the stock GA-2100-1A1 and DW5600E-1V.

GA-2100 vs DW-5600 specifications
GA-2100DW-5600
DisplayAnalog-digitalDigital
ShapeOctagonalSquare
Case size (L × W × H)48.5 × 45.4 × 11.8 mm48.9 × 42.8 × 13.4 mm
Thickness11.8 mm13.4 mm
Weight51 g (1.8 oz)52 g (1.8 oz)
CaseCarbon fiber–reinforced resin (Carbon Core Guard)Resin
Water resistance200 m / 20 bar200 m / 20 bar
PowerBattery: SR726W × 2, about 3 yearsBattery: CR2016, about 2 years
Tough SolarNoNo
Multi-Band 6NoNo
BluetoothNoNo
Module56113229, 3525
Launched20191987; module 3229 (2011); module 3525 (2023)
Casio U.S. list price$110$99.95

Which one should you buy?

Choose the GA-2100 if

  • You want analog hands you can read at a glance.
  • You want a thinner case (11.8 mm vs 13.4 mm).
  • You want the octagonal CasiOak style.

Choose the DW-5600 if

  • You prefer an all-digital display.
  • You want the original 1983 G-SHOCK silhouette.
  • You want the lowest list price ($99.95 vs $110).

What the GA-2100 and DW-5600 have in common

  • Both weigh about 51–52 g.
  • Both are rated 200 m water resistant.
  • Both run on batteries, not solar.

GA-2100 vs DW-5600: questions

Which is better for a small wrist?

Both are compact. The DW-5600 is narrower (42.8 mm vs 45.4 mm wide) while the GA-2100 is thinner (11.8 mm vs 13.4 mm).

Not sure? Send us your wrist size and how you'll wear it; a person replies.

Sources

  1. Casio: GA-2100-1A specifications (official Casio, accessed October 25, 2026)
  2. Casio G-SHOCK (U.S.): GA2100: Slim & Tough Analog-Digital Watches (official Casio, accessed October 25, 2026)
  3. Casio: GA-2100K-1A specifications (battery, band size) (official Casio, accessed October 25, 2026)
  4. G-Central: G-SHOCK GA-2100 specifications (independent reference, accessed October 25, 2026)
  5. Casio G-SHOCK (UK): Are G-SHOCK watches waterproof or water resistant? (official Casio, accessed October 25, 2026)
  6. Casio (U.S.): GA-B2100-1A specifications (official Casio, accessed October 25, 2026)
  7. Casio (Europe): DW-5600E-1V specifications (official Casio, accessed October 25, 2026)
  8. Casio (U.S.): Classic G-SHOCK DW5600E-1V (official Casio, accessed October 25, 2026)
  9. G-Central: G-SHOCK DW-5600 specifications (independent reference, accessed October 25, 2026)
  10. Casio (Europe): GW-M5610U-1 (DW-5000C design legacy) (official Casio, accessed October 25, 2026)
  11. G-Central: G-SHOCK GW-M5610 specifications (independent reference, accessed October 25, 2026)