The YEMA watch is a sophisticated timepiece designed for enthusiasts and professionals alike, particularly those involved in water sports and diving. It is equipped with a self-winding mechanical movement, meaning it harnesses the natural motion of your wrist to power itself. This automatic winding mechanism ensures that as long as you wear the watch daily, it will maintain optimal winding and accurate timekeeping without the need for manual intervention. However, for initial use or after a prolonged period of not being worn, manual winding is required to kickstart the movement.
Function Description
The core function of the YEMA watch revolves around precise timekeeping and specialized features for diving.
- Time Display: The watch displays time through traditional hour, minute, and second hands, ensuring clear and immediate readability.
- Self-Winding Mechanical Movement: At the heart of the YEMA watch is a self-winding mechanical movement. This advanced mechanism eliminates the need for batteries, relying instead on the kinetic energy generated by the wearer's wrist movements. This ensures continuous operation as long as the watch is worn regularly.
- Screw-Down Crown: A critical feature for its waterproof capabilities, the watch is equipped with a screw-down crown. This mechanism ensures that the crown is securely sealed against the watch case, preventing water ingress and maintaining the watch's waterproof integrity.
- Unidirectional Rotatable Bezel: Designed specifically for dive measurement, the watch features a unidirectional rotatable bezel. This bezel allows for precise timing of dive durations. Its unidirectional nature, rotating only counter-clockwise, is a crucial safety feature. This design prevents accidental increases in the indicated dive time, which could lead to critical miscalculations during a dive.
Usage Features
Operating the YEMA watch involves several key steps, particularly for winding, time setting, and utilizing the dive bezel.
- Position A: Screwed-Down Position: This is the default and most secure position for the crown. In this position, the screw-down crown is fully sealed against the watch case, ensuring the watch's waterproofness. It is essential to ensure the crown is in this position when the watch is exposed to water or not being adjusted.
- Position B: Manual Winding: To manually wind the watch, you first need to unscrew the crown from Position A. Once unscrewed, the crown is in Position B. In this position, turning the crown clockwise will wind the mechanical movement. This is necessary when first using the watch or after it has been unworn for an extended period, to build up the power reserve.
- Position C: Time Setting: To set the time, unscrew the crown from Position A and then pull it out to the last notch, which is Position C. In this position, the seconds hand will stop, allowing for precise time adjustment. You can then turn the crown in either direction until the hour and minute hands indicate the correct time. Once the time is set, push the crown back in and screw it down to Position A to re-engage the waterproof seal.
- Bezel Function for Dive Timing: The unidirectional rotatable bezel is a primary tool for divers.
- Unlocking the Bezel: Before a dive, unscrew the crown to Position B. This action unlocks the bezel, allowing it to be rotated.
- Setting the Dive Start Time: Turn the bezel until the 12 o'clock triangle marker is aligned with the minute hand. This alignment marks the beginning of your dive.
- Locking the Crown: After setting the bezel, screw the crown back down to Position A. This secures the bezel in place and ensures the watch's waterproofness during the dive.
- Reading Dive Duration: As the dive progresses, the minute hand moves, and its position relative to the bezel's graduation indicates the elapsed dive time. The unidirectional rotation ensures that if the bezel is accidentally bumped, it will only show a longer elapsed time, never a shorter one, enhancing diver safety.
Maintenance Features
Maintaining your YEMA watch is straightforward, focusing on ensuring its longevity and performance, especially its waterproof capabilities.
- Crown Security: Always ensure the crown is perfectly screwed down after any adjustments (winding, time setting). A fully screwed-down crown against the case is crucial for maintaining the watch's waterproof guarantee.
- Shock Avoidance: Mechanical watches are delicate instruments. It is advisable to avoid activities that could expose the watch movement to significant shocks, as these can affect its accuracy and internal components.
- Cleaning Procedures:
- Gentle Cleaning: For general cleaning of the metal, rubber, or fabric bracelets and the waterproof case, use a microfibre cloth and a soft brush with soapy water. This method is effective for removing dirt and grime without damaging the watch's surfaces.
- Chemical Avoidance: Never use harsh chemicals, abrasive products, or corrosive substances such as solvents, detergents, or perfumes to clean your YEMA watch. These can damage the materials, finishes, and seals of the watch.
- Saltwater Exposure: After your watch has been exposed to saltwater, it is imperative to rinse it thoroughly with fresh water. This prevents salt buildup and corrosion, which can degrade the watch's materials and seals over time.
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