• CASIO EFS-S660D-1AJF
1 1

CASIO · JAPANESE-MARKET REFERENCE

EFS-S660D-1AJF

EFS-S660D-1AJF

¥34,820 JPY
¥34,820 JPY
Sale Sold out
Taxes included. Shipping calculated at checkout.

This EDIFICE solar chronograph concentrates its timing functions in a compact 38.3 mm case. A chronograph hand at twelve o'clock measures in 1/20-second increments, with a tachymeter around the outer edge. The textured dial allows light through for solar charging while clearly differentiated hands support quick reading. Sapphire glass, 10-bar water resistance and solar power suit everyday use. A stainless steel case and bracelet are accented by a blue chronograph hand.

Reference
EFS-S660D-1AJF
Case (H × W × D)
45.3 × 38.3 × 11.6 mm
Weight
129 g
Listed water resistance
10-bar water resistance

🎉 Buy 2 Watches, Get 20% Off One
Choose any 2 watches and receive 20% off the lower-priced watch. All products are eligible. The offer applies to one watch per order.

🚚 Get Extra Savings to Help Cover Shipping
Spend ¥35,000 (Approximately $225 USD | €198 EUR) or more after product discounts and receive an additional ¥3,000 (Approximately $20 USD | €18 EUR) off your order subtotal.

Both offers can be combined and are applied automatically at checkout. No code needed.

The qualifying subtotal excludes shipping and taxes. The qualifying amount and discount are based on Japanese yen. Amounts shown in your selected currency may vary with exchange rates.

Before & after your purchase

Read our shipping and return information before ordering. Model-specific warranty and repair guidance is available below.

Buying from JapanSize & function guide
Setup & support

Model reference: EFS-S660D-1AJF

Search the official manual using this model or the module number on your watch.

Find the official CASIO manual
Before you choose

Warranty & service

Local warranty service outside Japan is not guaranteed. Read our return and repair policy and ask about your exact reference before ordering.

Bracelet fit & adjustments

Check the case dimensions and band details in the specifications. Ask us about fit, included links and adjustment options before placing an order.

Packaging & included items

Included items can vary by reference. Contact us with the model number to confirm the box, documents and accessories.

Ask about this reference

Order help & returns

Customs Duties & ShippingReturn and RepairRead the FAQ
Product details
Model
EFS-S660D-1AJF
JAN / EAN
4549526435911
Band material
Metal bracelet
Crystal material
Sapphire crystal
Weight
129 g
Case size (L × W × H)
45.3 × 38.3 × 11.6 mm
Price
¥34,820 JPY
Country of origin
JP

Specifications

Release date August 2026
Case size (H × W × D) 45.3 × 38.3 × 11.6 mm
Weight 129 g
Case and bezel material Stainless steel
Band Stainless steel bracelet; One-touch three-fold clasp
Water resistance 10-bar water resistance
Power supply and battery life Solar charging system

Exterior details

Glass Sapphire crystal with anti-reflective coating on the inner surface
Compatible wrist size 150–205mm

Watch functions

Stopwatch 1/20-second stopwatch, 60-minute capacity, split timing
Battery indicator and alerts Battery charge warning
Operating time Operating time from a full charge until the hands stop: approximately 5 months
Accuracy Accuracy: ±20 seconds per month
Other features Date display
View full details