Casio MTD-140D-2A Men's 100m Blue Dial Marine Sports Watch

Casio MTD-140D-2A Marine Sports Watch is a men's analog watch with a blue sunray dial and a stainless steel case, bezel and link band. It is made for active wear, with 100-meter water resistance and a slim 9.5 mm case that fits under sleeves.

The Casio MTD-140D-2A Marine Sports Watch has a 100-meter (10 bar) water resistance rating, so it suits swimming, snorkeling and surface water sports rather than professional scuba diving. Its blue sunray dial is paired with luminous hands and geometric index markers that help you read the time in low light. The one-touch triple-fold deployment clasp locks during movement and opens with a press. Stainless steel across the case, bezel and bracelet gives the watch a full-metal build that resists rust and everyday knocks.

Key features and benefits of the Casio MTD-140D-2A Marine Sports Watch

• Stainless steel case: The case is solid stainless steel, a metal that resists rust and takes everyday knocks. That gives the watch a rigid shell for daily wear around water and outdoor activity.
• Stainless steel bezel: A matching stainless steel bezel sits around the dial. It adds a metal border that helps protect the edge of the watch face from accidental contact.
• Stainless steel link band: The bracelet uses stainless steel links. It keeps the look consistent with the case and is made to resist tarnish over time.
• 100-meter water resistance: The watch is rated to 100 meters (10 bar). This covers swimming, snorkeling and surface water sports, but not professional scuba diving.
• Luminous hands: The hands carry luminous material. After light exposure they glow, so checking the time in darkness or deep water is easier.
• Luminous index markers: Geometric hour markers also have luminous filling. They work with the hands to keep the whole dial readable in low light.
• Blue sunray dial: The dial has a blue sunray finish that shifts with the light. It gives the watch a marine look while keeping contrast with the pale luminous details.
• 9.5 mm case thickness: The case is 9.5 mm thick. That slim profile is designed to slide under shirt cuffs and jacket sleeves without catching.
• One-touch triple-fold clasp: The deployment clasp opens with a push and folds closed in three parts. It is meant to stay locked during vigorous movement and make putting the watch on quicker.
• Analog display: The watch uses a traditional analog layout with hands and index markers. That makes it simple to read at a glance and suits both casual and business-casual wear.
• Marine Sports Standard Analog series: The model belongs to Casio's Marine Sports Standard Analog series. It sits in a line made for water-focused casual wear.

Who the Marine Sports Watch is for

The Casio MTD-140D-2A Marine Sports Watch suits men who want one watch for water sports, casual days and business-casual settings. Its 100-meter water resistance covers swimming and snorkeling, while the 9.5 mm stainless steel case is slim enough for a shirt cuff. Luminous hands and markers help early runners and night-shift workers. The secure deployment clasp is useful for gym sessions or boat work.

• Morning swim laps before a commute in a business-casual workplace.
• Weekend snorkeling when you need a quick time check in the water.
• Evening runs or dog walks where the luminous dial is easy to read.
• Travel days that move from an airport to a beach dinner without changing watches.
• Desk work where the slim case avoids catching on cuffs.

Less suitable if: you need a dive computer or an ISO 6425 certified diver's watch, as this model is rated for water sports but not for professional scuba diving.

Marine Sports Watch specifications

Using and caring for the Casio MTD-140D-2A Marine Sports Watch

A few simple habits keep the Casio MTD-140D-2A Marine Sports Watch ready for use. Rinse the stainless steel case and bracelet with fresh water after saltwater or chlorine, then dry them with a soft cloth. Let the dial sit in light for a few minutes to recharge the luminous hands and markers. When opening the clasp, press both release buttons rather than pulling the band.

• Rinse with fresh water and dry with a soft cloth after saltwater or pool use.
• Charge the luminous hands and markers by exposing the dial to light for a few minutes.
• Press both release buttons to open the clasp; do not force the band.
• Avoid pressing buttons or operating the crown while underwater.
• Store the watch in a dry place away from strong magnetic fields.

How to choose the right Marine Sports Watch

When you choose a marine sports watch, water resistance, case thickness, clasp security and low-light legibility matter most. The Casio MTD-140D-2A Marine Sports Watch has 100-meter (10 bar) water resistance for swimming and snorkeling, a 9.5 mm case for cuff clearance, a one-touch triple-fold deployment clasp for secure wear, and luminous hands with geometric index markers on a blue sunray dial. Match those confirmed values to your main activities before deciding.

Frequently asked questions

What is the Casio MTD-140D-2A Marine Sports Watch made of?

The case, bezel and link bracelet are stainless steel. The dial is blue sunray and carries luminous hands and index markers.

How thick is the case on this Casio watch?

The case is 9.5 mm thick. That slim profile is intended to fit under shirt cuffs and jacket sleeves.

Can I swim or snorkel with the Casio MTD-140D-2A?

Yes, the watch has 100-meter (10 bar) water resistance for swimming, snorkeling and surface water sports. It is not a professional scuba diving watch.

How does the one-touch triple-fold clasp open?

Press the release buttons on both sides of the clasp to open it. The triple-fold design closes securely for active wear.

Do the hands and markers glow in the dark?

Yes, the hands and geometric index markers are luminous and glow after exposure to light. That helps with time checks in low light or underwater.

What is included with the Casio MTD-140D-2A Marine Sports Watch?

The watch is the included item, supplied on its stainless steel link bracelet. No extra straps, tools or documentation are listed with it.

Who is this Casio watch designed for?

It suits men who want a watch for swimming, snorkeling, casual wear and business-casual settings. The slim 9.5 mm case and luminous dial cover day and night use.

How is it different from a dedicated dive watch?

This model is rated for water sports but not professional scuba diving. It lacks a rotating bezel, screw-down crown and helium valve, which are features associated with ISO 6425 dive watches.