Hamilton Jazzmaster Open Heart - 40mm

An 'Open Heart' design features a cutout on the dial that reveals a portion of the watch's mechanical movement, allowing you to see parts of the balance wheel or gears in motion.

The 80-hour power reserve means that once fully wound, the watch will continue to run accurately for approximately 80 hours, even if you take it off.

The Jazzmaster Open Heart has 50m water resistance, which is suitable for accidental splashes or light rain. It is not recommended for swimming, diving, or prolonged water exposure.

For optimal performance and longevity, it is generally recommended to have an automatic watch serviced by a qualified watchmaker every 3 to 5 years.

Yes, the durable construction with a sapphire crystal and stainless steel bracelet makes it suitable for everyday wear. Just be mindful of the water resistance limitations.

An automatic watch is powered by the movement of the wearer's wrist, storing energy in a mainspring. A quartz watch is powered by a battery and uses a quartz crystal to regulate timekeeping, generally requiring less maintenance but not offering the mechanical complexity of an automatic.

Adjusting a stainless steel bracelet typically involves removing links, which requires specialized tools. It is highly recommended to have this done by a professional watchmaker or an authorized dealer to avoid damaging the bracelet.

Manually wind the crown 30-40 times clockwise until resistance is felt. If the issue persists after winding, ensure the watch has not been exposed to strong magnetic fields or severe shocks. Contact an authorized service center if needed.

Automatic watches can have a daily variation. If the deviation is more than 15-30 seconds per day, check if the watch has been exposed to extreme temperatures, strong magnetic fields, or physical shocks. Consistent significant deviation may require a service adjustment from an authorized watchmaker.

Ensure you are turning the crown in the correct direction (clockwise to wind). If it feels stiff, do not force it. Lint or debris might be present. It is best to have it inspected by a professional watchmaker.

This can sometimes occur with metal bracelets. A professional watchmaker can assess if lubrication or adjustment is needed. Ensure no foreign particles are causing the noise.