MRG-B2100D-1ADR Watch

The Watch

Casio is a Japanese brand founded in 1946 by Tadao Kashio. Originally specializing in calculators, the company achieved great success with its electronic products and began diversifying into watchmaking in the 1970s. Its watches stand out for an exceptional combination of versatile features, durability, and reliability, making them ideal companions for adventurers and everyday users alike. Equipped with precise chronographs, convenient timers, and perfectly suited to both sports and daily tasks, these timepieces are built for life. Most models offer excellent water resistance - often up to 200 meters - and feature innovative designs capable of withstanding shocks, vibrations, and harsh conditions. Crafted from durable materials such as resin and stainless steel, they deliver optimal protection against wear and impact. Today, the brand invites you to discover the MRG-B2100D-1A watch, designed to be your companion on every occasion. It features an octagonal case crafted from Ti64 titanium, a corrosion-resistant material prized for its exceptional strength and remarkable lightness. Brushed and polished, the case measures 49.50 mm in length, 44.40 mm in diameter, and 13.60 mm in thickness. Its bezel is made up of 27 distinct components and features inscriptions on a brushed circular finish. The top section is crafted from cobarion, an alloy approximately four times harder than pure titanium with a striking brilliance. It surrounds a sapphire crystal that protects the dial from impacts - scratch-resistant and treated with an anti-reflective coating that preserves aesthetics while ensuring effortless legibility. The central elements are operated by a grey crown at 3 o'clock featuring grooves for a secure grip, along with 2 push-buttons integrated on the right side. This watch weighs 122 g and is secured by a case back held with screws featuring a DLC finish, ensuring water resistance of 20 ATM.

The Dial

This dial is meticulously designed for clear, fluid readability. It features special decorative elements inspired by traditional Japanese wood joinery techniques known as kigumi. Its base surface takes on a wave-like form with an intricate series of openings, creating a geometric lattice pattern of remarkable beauty. On its metallic black finish, it displays a minute track along the edge with baton-style hour markers. Three central hands sweep over these together, ensuring reliable timekeeping. The slender red seconds hand counts the seconds, while the long and short hands indicate the minutes and hours. Both grey hands are coated with a Neobrite treatment, as are the hour markers, guaranteeing optimal legibility in the dark. The dial also benefits from a high-brightness LED light to maintain readability whenever needed. At 3 o'clock sits a date window, and at 8 o'clock an additional subdial. Fitted with a small grey seconds hand, this subdial displays the day of the week in a retrograde fashion in English, as well as the DST setting. Several indicators are marked, including the letters (Y) and (N) positioned between 9 and 11 o'clock for time signal reception, phone connection, and whether or not time correction was successful and whether it is enabled or disabled. Also present are the letters (C) and (RC) near 6 o'clock for the connection between the watch and a phone, as well as reception of the calibration signal when in progress - indicated by the fine red seconds hand pointing in the correct direction. Finally, the dial is signed with the brand name and collection name beneath the 12 o'clock double index marker.

Functions

Time Adjustment

Radio-Controlled Watch: Multiband 6

Bluetooth: connects to a smartphone and automatically adjusts the time

Smartphone Link Functionality

Mobile Link (wireless connection via Bluetooth®)

Apps

Casio Watches

App Connectivity Feature

Automatic Time Adjustment

Easy Watch Setting

Time and Location

Watch Status Display

Self-Check

Phone Finder

Premium Production Line Certificate

Calendar

Full Auto-Calendar (until the year 2099)

Hand Home Position Correction Function

Automatic Hand Home Position Correction

Other Features

Regular timekeeping display: analog: 3 hands (hour, minute (hand moves every 10 seconds), second), 1 subdial (mode)

Date Display

Day Indicator

Time Adjustment Details

Time calibration signal reception Automatic reception up to six* times per day (remaining automatic receptions are canceled as soon as one succeeds) *5 times per day for the Chinese calibration signal Manual reception Last 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

The Movement

At the heart of this watch beats an in-house solar movement. Equipped with a Tough Solar system that makes it virtually self-sufficient, it delivers a precision of ±15 seconds per month (without the Mobile Link function) across its various functions. The dial's openings allow light to pass through, enabling the mechanism to generate the energy it needs. In the dark, its power reserve is approximately 5 months, and when stored in complete darkness, approximately 18 months. To conserve energy, the power-saving mode activates after a full charge and the hands stop.

The Bracelet

This stunning bracelet will adorn your wrist with everyday elegance. Crafted in DAT55G titanium, a material three times harder than pure titanium, it delivers remarkable strength and lightness. Its brushed and polished links will elevate your look with their beautiful finish, conforming naturally to the contours of your wrist and complementing any outfit thanks to its silver tone. From sports to casual evenings, it works with every style. This bracelet fits wrist circumferences from 150 to 205 mm in length and features a triple-fold deployant clasp with a single push, making it effortless to put on and take off.

Water Resistance

This model offers water resistance of 20 atmospheres, or 200 meters. Ladies and gentlemen, this is a watch that can take you deep into aquatic adventures! This model is built for freediving. No fear of water - you can even use high-pressure washers with this timepiece on your wrist. Showering, bathing, swimming, and freediving are all no problem. However, for scuba diving with tanks, we recommend a timepiece with a higher water resistance rating. Also be sure not to operate the crown or push-buttons while submerged, to preserve the integrity of the movement.