• Casio CRW-001-1 Ring Watch in stainless steel with full-metal MIM construction, 20 mm inner diameter (JP size 22) plus size spacers, mini digital LCD module with time, date, dual time, stopwatch, LED backlight, water resistance, and 16 g lightweight build.”
  • Hand wearing a Casio watch with a ring, working on a puzzle.
  • Casio digital watch and ring on a white background
  • Mechanical watch components on a white background
  • Black digital watch on a black background
  • Casio watch in an open black box with a closed box and drawstring bag on a light gray background
  • Person's hand with a ring on a vinyl record player
  • Hand holding a slice of pizza with a ring on a dark background
  • Silver ring on a white background
  • Two clear dental retainers on a white background
  • Digital watch and keychain set on a black tray with wooden surface
  • Black watch icon on a white background with text about dual city time checking.
  • Casio CRW-001-1 Ring Watch in stainless steel with full-metal MIM construction, 20 mm inner diameter (JP size 22) plus size spacers, mini digital LCD module with time, date, dual time, stopwatch, LED backlight, water resistance, and 16 g lightweight build.”
  • Person playing guitar with a dark background, followed by close-up shots of hands and a pizza.
  • Text description of a Casio watch feature on a white background
  • Advertisement for a miniature digital watch module with text describing its features.
  • Digital watch with pulsing light feature on a white background
  • Special packaging with Gucci box and bag on a light gray background
  • Text about Casio's yubiwa pipe and its significance in the company's history on a black background.
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CASIO

CASIO CRW001-1 : 50TH ANNIVERSARY CASIO RING WATCH

CASIO CRW001-1 : 50TH ANNIVERSARY CASIO RING WATCH

$135.00 USD
$135.00 USD $135.00 USD
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Casio Ring Watch – Model CRW-001-1

The CRW-001-1 introduces a new style of digital watch — a full-metal Casio timepiece miniaturized into a wearable ring. Both playful and practical, this innovative design combines advanced metalworking with the iconic digital watch functions that Casio is known for.

Design Overview

Created using metal injection molding (MIM), the case, back, and ring are formed in one seamless piece, faithfully reproducing the dimpled details of a classic Casio watch band. Despite its size, it’s water resistant and equipped with a replaceable battery.

The ring has an inner diameter of 20 mm (fits US size 10.5 / EU U / JP size 22) and includes two size-adjusting spacers for JP size 19 (19 mm) and JP size 16 (18 mm). Weighing only 16 g, it offers comfort without compromising durability.

The watch module, downsized by a factor of 10, features a 7-segment LCD with essential functions: timekeeping (hours, minutes, seconds), date, dual time, stopwatch, and hourly time flash. A built-in LED backlight ensures visibility, while the flashing light effect adds a poetic note to the passing of time.

Key Highlights

✔ Innovative full-metal ring watch created with MIM technology
✔ Stainless steel case with mineral glass
✔ Compact digital module with time, date, dual time, stopwatch
✔ LED backlight and hourly flashing light feature
✔ Water resistant with replaceable battery
✔ Lightweight at 16 g, includes two size-adjusting spacers (JP sizes 19 & 16)

Features & Specifications

Basic Information

  • Case Size: 25.2 × 19.5 × 6.2 mm

  • Weight: 16 g

  • Case/Bezel: Stainless Steel

  • Water Resistance: Water Resistant

  • Battery: SR621SW, approx. 2 years

Exterior

  • Glass: Mineral Glass

  • Ring Size:

    • JP size 22 (20 mm inner diameter, 62.8 mm circumference)

    • Includes spacers for JP size 19 (19 mm / 59.7 mm circumference) and JP size 16 (18 mm / 56.6 mm circumference)

Watch Functions

  • Timekeeping: Hour, minute, second, pm, month, date, day

  • Dual Time

  • Stopwatch: 1/100-second, up to 59’59.99’’

  • Alarm: Hourly flash (entertainment use)

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

  • Accuracy: ±30 seconds per month

Lighting

  • LED backlight (white)

Summary

The Casio CRW-001-1 is not just a watch — it’s a fusion of jewelry and timekeeping innovation. With its miniature digital module, stainless steel build, and ring-style form factor, this playful yet practical design offers a completely new way to experience Casio’s legendary digital heritage.

For more details, visit the official CASIO website here.

Warranty:

  • The watch is covered by a warranty, providing assurance and protection for your purchase.

▶︎Processing Time & Shipping Policy
▶︎Refund policy
▶︎We only carry G-SHOCK USA products.
▶︎Unfortunately, we DO NOT ship internationally.

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CASIO G-SHOCK COLLECTION

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Gshock, Casio, Made in Japan

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Explore our current selection of G-SHOCK watches. If you don’t see your preferred model, check the G-SHOCK USA website, note the model number, and contact us via email or phone(415-567-2400) to place your order. Ask about our special deals!

Please note:

  • We only carry G-SHOCK USA products.
  • Unfortunately, we DO NOT ship internationally.
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Trusted Since 1967

Our owner, Asuka Saito, is certified by both Gemological Institute of America (GIA) and Cultured Pearl Association of America (CPAA), and we also have a GIA-certified appraiser on staff. Asuka is also a color specialist, certified as a TC Color Therapist and Sensational Color.

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