Watches

CASIO CRW001‑1D Ring Watch — Digital Ring Timepiece

The CASIO CRW001‑1D Ring Watch is a playful yet practical mini digital watch worn on your finger, created to celebrate Casio’s 50th anniversary of making digital watches. Rather than a traditional wristwatch, this model miniaturizes Casio’s classic digital design into a fully functional ring‑sized timepiece crafted from stainless steel using advanced metal injection molding (MIM) technology.

Despite its tiny size, the CRW001‑1D includes essential digital functions such as timekeeping, dual time zone display, stopwatch, alarm/hourly alert, and calendar — all shown on a miniature 7‑segment LCD. With a stylish silver finish and functional digital module, it’s both a conversation piece and a wearable gadget for everyday use.

Specifications

Design & Build

• Model: CRW001‑1D

• Style: Digital Ring Watch

• Case & Bezel Material: Stainless Steel (full‑metal construction)

• Glass: Mineral Glass

• Color: Silver finish

• Water Resistance: Water resistant for everyday use (splash‑proof)

Dimensions & Weight

• Case Size (L × W × H): approx. 25.2 × 19.5 × 6.2 mm

• Weight: approx. 16 g

• Ring Fit:

  • Inner diameter: 20 mm (fits US size 10.5 / EU U / JP size 22)

  • Circumference: 62.8 mm

  • Includes 2 size‑adjusting spacers for inner diameters 19 mm (size 19) and 18 mm (size 16)

Display & Functions

• Display Type: Digital 7‑segment LCD

• Timekeeping: Hours, minutes, seconds, am/pm

• Dual Time: Ability to view two time zones

• Stopwatch: 1/100‑second stopwatch mode

• Alarm / Hourly Alert: Time flash function

• Calendar: Auto‑calendar (28 days for February)

• 12/24‑Hour Format: Yes

• LED Backlight: White LED for reading in low light

• Accuracy: ±30 seconds per month

Battery & Power

• Battery Type: SR621SW

• Battery Life: Approx. 2 years