This special MTGB3000PRB model combines metal and resin with advanced technology and is designed based on the concept of the aurora oval.

A new type of top bezel made of stainless steel is recrystallized, deep hardened, and then finished with a rainbow ion-plated (IP) coating.
The pattern of the recrystallization and the coloring of the rainbow
IP create unique finishes so that no two watches are alike.
The back cover of the watch is made of stainless steel with a
rainbow IP finish, which is then re-polished to reveal the stainless
steel material of the raised parts of the cover. The soft urethane
band of this model is a new semi-transparent purple color,
highlighted by a brown IP band loop and a purple IP buckle.
The base model is the MTGB3000, and its design reproduces the
look of the aurora borealis when viewed from space.

Features

Rainbow IP applied to bezel after recrystallisation and deep-layer hardening

The stainless-steel bezel is first treated with recrystallisation and deep-layer hardening processes to form a hard layer on the surface of the material and create a unique, brilliantly gleaming texture. Then, a rainbow IP coating is applied to the surface to express the look of the aurora borealis as seen from outer space. With its impressive beauty of form, the watch demonstrates a dedicated passion for design in its materials, colours, and finishes.

*The stainless steel is processed into components and then recrystallised, yielding unique differences in crystalline grain. This makes the pattern, colour tone, and lustre differ subtly from part to part.
*The look of the rainbow IP colour will vary from watch to watch.

Deep-layer hardening process (stainless steel)
This technology creates a hard layer by infusing carbon into the surface of the steel. Unlike coatings, the process delivers enhanced strength by hardening the material itself.

Intricately shaped case back: Rainbow IP + repolished finish

The intricately shaped case back with raised sides is made to interlock with the top bezel to create a minutely detailed metal exterior with a profound look. Integrated moulding is used to achieve high rigidity using repeated processes of forging, cutting, and polishing. In addition, a special, unique finish is created by applying a rainbow IP coating to the surface of the material and using a repolishing process to remove the coated layer from only the raised portions on the back of the case. This unique design technology pairs the original gleam of the metal with the multi-coloured blend of shifting hues.

*Exact rainbow IP colour will vary from watch to watch.

Dual Core Guard structure: Delivering rigidity, compact form, and lightness with an intricately shaped case back

The Dual Core Guard structure protects the module with a carbon fibre-reinforced resin case and encloses the case with metal components. The side of the case back is raised to serve as the lugs that connect the bands to the case and as the guards for the crown and buttons. While delivering enhanced rigidity, integrated moulding also helps make the watch so compact and lightweight.

Translucent purple band: A complement to the metal exterior

Translucent resin is used for the band. A new purple hue expresses the mysteriously beautiful colouration of the aurora borealis. Purple IP is applied to the buckle, brown IP to the band loop. Simply press the buttons located on both sides of the lugs to quickly and easily change the band without special tools.

 Specifications

• Case size (L× W× H)

  51.9 × 50.9 × 12.1 mm

• Weight

  111 g

• Case and bezel material

  Case / bezel material: Carbon / Stainless steel

• Band

  Resin Band

• Construction

  TRIPLE G RESIST (Shock resistant, Centrifugal force resistant, Vibration resistant)
  Carbon Core Guard structure

• Water resistance

  200-meter water resistance

• Time adjustment

  Radio-controlled Watch; Multi band 6

• Power supply and battery life

  Tough Solar (Solar powered)

• Smartphone Link feature

  Mobile link (Wireless linking using Bluetooth®)

• Apps

  CASIO WATCHES

• App connectivity feature

  Auto time adjustment
  Easy watch setting
  Approximately 300 world time cities
  Time & place
  Watch status display
  Self check
  Phone finder

• Glass

  Sapphire crystal with glare-resistant coating

• Crown

  Screw Lock Crown

• Surface treatment

  Deep Layer Hardening + Ion Plating case

• Compatible band size

  145 to 215 mm

• Other

  Neobrite

• World time

  Dual time 27 time zones, Home city time swapping, auto summer time (DST) switching

• Stopwatch

  1-second stopwatch Measuring capacity: 23:59'59. Measuring modes: Elapsed time, split time

• Timer

  Countdown timer Measuring unit: 1 second Countdown range: 24 hours Countdown start time setting range: 1 minute to 24 hours (1-second increments)

• Alarm/hourly time signal

  Daily alarm

• Light

  LED light (Super Illuminator) Afterglow

• Light color

  LED:White

• Calendar

  Full auto-calendar (to year 2099)

• Hand home position correction feature

  The auto hand home position correction

• Energy saving feature

  Power Saving (hands stop to save power when the watch is left in the dark)

• Battery display/alert

  Battery level indicator

• Run time

  Approx. battery operating time: 5 months on rechargeable battery (operation period with normal use without exposure to light after charge) 18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)

• Accuracy

  Accuracy: ±15 seconds per month (with no signal calibration)

• Other features

  Regular timekeeping: Analog: 3 hands (hour, minute (hand moves every 5 seconds), second), 3 dials (dual time hour and minute, dual time 24 hour, day)

• Time adjustment details

  Time calibration signal reception Auto receive up to six* times a day (remaining auto receives canceled as soon as one is successful) *5 times a day for the Chinese calibration signal Manual receive The latest signal reception results
  Time Calibration Signals Station name: DCF77 (Mainflingen, Germany) Frequency: 77.5 kHz Station name: MSF (Anthorn, England) Frequency: 60.0 kHz Station name: WWVB (Fort Collins, United States) Frequency: 60.0 kHz Station name: JJY (Fukushima, Fukuoka/Saga, Japan) Frequency: 40.0 kHz (Fukushima) / 60.0 kHz (Fukuoka/Saga) Station name: BPC (Shangqiu City, Henan Province, China) Frequency: 68.5 kHz