Automatic watches use a self-winding mechanical movement powered by the wearer's wrist motion, while quartz watches rely on a battery for operation. With an automatic watch, there's no need to replace batteries; instead, regular wear helps keep it running. However, if not worn for a while, it may stop and need to be reset. Quartz watches typically require less maintenance but don't offer the same traditional craftsmanship that many enthusiasts appreciate in automatic designs.

Many green automatic watches offer water resistance, but the level can vary by model. Some are designed for diving and can handle swimming or snorkeling, while others are only splash-resistant. It's important to check the water resistance rating in the product details:

• Look for ratings like 5 ATM (suitable for showering or surface swimming) or 20 ATM (suitable for diving).
• Avoid pressing buttons or setting the time while the watch is wet.

Be sure to follow care instructions to help maintain water resistance over time.

Adjusting the strap depends on whether your automatic watch has a metal bracelet, silicone, or leather band:

• For metal bracelets, you may need a small tool or visit a jeweler to remove or add links.
• Silicone and leather straps often have buckle holes for easy adjustment at home.
• Always secure the clasp or buckle to ensure a comfortable yet snug fit.

If you're unsure, professional resizing services are available at many jewelry counters, including Walmart.

To keep your green dial automatic watch looking its best, regular cleaning is key:

• Gently wipe the case and band with a soft, lint-free cloth to remove fingerprints and dust.
• For metal bands, use a little warm, soapy water and a soft brush, but avoid soaking the watch unless it's rated for water resistance.
• Avoid harsh chemicals or abrasive cleaners as these can damage the finish.

Dry thoroughly, and store your watch in a cool, dry place when not in use.

If your automatic watch stops, it's likely because it hasn't been worn or moved for a while. Here are some steps you can try:

• Gently shake the watch or wind it manually if it has a winding crown (refer to the manual for the exact method).
• Once it's running, regular wear will keep it powered.
• If it still doesn't start, check for any visible issues or consult a professional watch technician for assistance.

Regular use can help maintain consistent timekeeping in automatic watches.