Max Bill Kleine Automatic Watch - 34mm

The primary difference is the case diameter. This 'Kleine' model is 34mm, matching the original 1961 design, whereas other Max Bill models may feature larger case sizes.

Yes, automatic watches are powered by the motion of your wrist. While they can be manually wound to start them or top them up, regular wear is the most effective way to keep them running.

Specific water resistance ratings vary, but models like this are generally not suitable for swimming or diving. It's best to avoid direct and prolonged contact with water.

Sapphire crystal is highly scratch-resistant but not completely unbreakable. It can still chip or crack under significant impact.

Junghans typically offers a manufacturer's warranty. Please refer to the warranty card included with your purchase or the official Junghans website for specific details.

Yes, changing the strap is usually straightforward. You will need a spring bar tool to remove the old strap and install a new one of the correct lug width (18mm for this model).

A self-winding or automatic movement uses a rotor that spins with the natural motion of your wrist to wind the mainspring, powering the watch without the need for a battery or manual winding (though manual winding is possible).

Manually wind the watch by rotating the crown clockwise about 30-40 times while in the closed position, or wear it for several hours. Ensure it has been wound sufficiently.

Ensure the time is not set between 9 PM and 3 AM when attempting to change the date. Manually advance the time past midnight to set the date, then reset the correct time.

Automatic watches can gain or lose a few seconds per day. Significant deviations may indicate a need for servicing. Avoid exposure to strong magnetic fields.

The leather strap can be replaced with a compatible 18mm strap of your choice. Consider materials like metal mesh or fabric for a different feel.