G-Shock GA-2100 “CasiOak” Family

The octagonal G-Shock that took over the world — the whole GA-2100 "CasiOak" family on one page.

This is Watch Portal's collection of original Casio G-Shock GA-2100 watches in the Philippines. Every piece is 100% original and covered by our moneyback guarantee, and we have been selling watches online in the Philippines since 2015, with delivery nationwide.

What You'll Find Here

• Core GA-2100 colorways — GA-2100-1A, GA-2100-1A1, GA-2100-4A and more from ₱6,993
• GA-B2100 models with Tough Solar power and Bluetooth connection
• Metal-bezel GM-2100 and the full-metal GM-B2100, topping out with the GM-B2100GD-9A at ₱36,594
• Mid-size GMA-S2100 and GMA-P2100 for smaller wrists, from ₱6,660
• Carbon Core Guard construction, shock resistance, and 200-meter water resistance across the family
• Verified live price range: ₱6,660 to ₱36,594

Why Shop at Watch Portal

• 100% original watches backed by a moneyback guarantee
• Selling watches online in the Philippines since 2015
• Pay via COD nationwide, GCash, debit or credit card, or online banking
• Delivery after dispatch: 3–7 calendar days in Metro Manila, 4–10 in the rest of the Philippines
• Responsive support Monday to Friday, 9am–5pm

Frequently Asked Questions

Are the watches at Watch Portal original?

Yes. Every watch we sell is 100% original and covered by our moneyback guarantee. We have been selling original watches online in the Philippines since 2015.

How much is the GA-2100 CasiOak in the Philippines?

The core GA-2100 — such as the GA-2100-1A1 — sells for ₱6,993 at Watch Portal. The wider family runs from ₱6,660 for the GMA-S2100WT-1A to ₱36,594 for the full-metal GM-B2100GD-9A.

Why is the GA-2100 called the "CasiOak"?

The nickname comes from its slim octagonal bezel, which recalls a famous luxury sports watch — "Casio" plus "Oak" — while keeping full G-Shock toughness at a fraction of the price.

Is the GA-2100 water resistant?

Yes. Like other G-Shocks, the GA-2100 family is rated to 200 meters (20 bar) of water resistance, so it handles swimming and everyday water exposure without worry.