CASIO · JAPANESE-MARKET REFERENCE

EFK-100YD-2AJF

Name: EFK-100YD-2AJF
Brand: CASIO
SKU: EFK-100YD-2AJF
Price: 51980.0 JPY
Availability: OutOfStock

¥51,980 JPY

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CASIO EFK-100YD-2AJF is a Japanese-market reference. The stainless steel case and bezel are paired with a solid stainless steel band. Mechanical automatic movement with manual winding. Listed water resistance: 10-bar water resistance.

Reference: EFK-100YD-2AJF
Case (H × W × D): 43.5 × 39 × 12.5 mm
Weight: 148 g
Listed water resistance: 10-bar water resistance

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Before & after your purchase

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

Buying from Japan Size & function guide

Setup & support

Model reference: EFK-100YD-2AJF

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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

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Product details

Model: EFK-100YD-2AJF
JAN / EAN: 4549526410635
Intended use: Wristwatch
Band material: Solid stainless steel band; one-touch three-fold clasp
Crystal material: Sapphire crystal
Weight: 148 g
Case size (L × W × H): 43.5 × 39 × 12.5 mm
Price: ¥51,980 JPY
Country of origin: JP

Specifications

Release date	July 2025
Japan MSRP	Japan MSRP: ¥49,500 (including Japanese tax)
Case size (H × W × D)	43.5 × 39 × 12.5 mm
Weight	148 g
Case and bezel material	Stainless steel
Band	Solid stainless steel band; one-touch three-fold clasp
Construction	Magnetic resistance (JIS Class 1)
Water resistance	10-bar water resistance
Movement	Mechanical automatic movement with manual winding

Exterior details

Glass	Sapphire crystal
Compatible wrist size	150–205mm
Case back	See-through screw-lock case back

Watch functions

Operating time	Power reserve: approximately 40 hours when fully wound
Accuracy	Accuracy: −35 to +45 seconds per day
Other features	Date display; stop-seconds function; 24 jewels; 21,600 vibrations per hour

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