Casio Vintage – Model B640WMR-5AVT

Overview

The popular retro B640 design in a rose gold finish. A rose gold ion plated stainless steel mesh band wraps the slim resin case, giving the familiar rectangular Casio Vintage shape a warmer, dressier look.

The adjustable clasp on the mesh band makes it easy to put on and take off, and at 55 g the watch stays light on the wrist.

Inside are the practical functions of the series: a 1/100-second stopwatch, a 24-hour countdown timer, multi-function alarm with flash alert, LED backlight, and a full auto-calendar — all with 50-meter water resistance.

Key Highlights

✔ Rose gold ion plated stainless steel mesh band
✔ Popular retro rectangular design
✔ Slim 9.4 mm case at only 55 g
✔ 50-meter water resistance
✔ 1/100-second stopwatch with split and 1st–2nd place times
✔ Countdown timer up to 24 hours with auto-repeat
✔ Multi-function alarm + hourly time signal
✔ Flash alert (flashes with the buzzer for alarms and the hourly signal)
✔ LED backlight (amber) with afterglow
✔ Full auto-calendar to the year 2039
✔ Approx. 3-year battery (CR2016)
✔ Accuracy: ±30 seconds per month

Technical Specifications

Basic Information

• Case Size (L × W × H): 38.9 × 35 × 9.4 mm
• Weight: 55 g
• Case & Bezel Material: Resin
• Band: Stainless steel mesh band, adjustable clasp
• Water Resistance: 50-meter water resistance
• Battery Life: Approx. 3 years on CR2016

Exterior

• Glass: Resin Glass
• Surface Treatment: Rose gold ion plated band

Watch Features

• Stopwatch:
  • 1/100-second stopwatch
  • Measuring capacity: 00'00''00–59'59''99 (first 60 minutes), 1:00'00–23:59'59 (after 60 minutes)
  • Measuring unit: 1/100 second (first 60 minutes), 1 second (after 60 minutes)
  • Measuring modes: Elapsed time, split time, 1st–2nd place times
• Timer:
  • Countdown timer, 1-second measuring unit
  • Countdown range: 24 hours
  • Start time setting range: 1 second to 24 hours (1-second, 1-minute, and 1-hour increments)
  • Auto-repeat
• Alarm: Multi-function alarm, hourly time signal
• Flash Alert: Flashes with the buzzer that sounds for alarms and the hourly time signal
• Light: LED backlight with afterglow
• Light Color: LED: Amber
• Calendar: Full auto-calendar (to year 2039)
• Accuracy: ±30 seconds per month
• Other Features:
  • 12/24-hour format
  • Regular timekeeping (hour, minute, second, PM, month, date, day)

Summary

The B640WMR-5AVT takes the retro B640 shape and finishes it in rose gold with a mesh band. A stopwatch, 24-hour timer, flash alert, and LED backlight sit behind the vintage face, and 50-meter water resistance covers everyday use.

B640WMR-5AVT — Retro digital in rose gold with a mesh band.

For more details, visit the official CASIO website here.

Warranty:

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

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▶︎We only carry CASIO USA products.
▶︎Unfortunately, we DO NOT ship internationally.