Introduction
This manual provides essential instructions for the proper setup, operation, and maintenance of your Nautica Men's NAPKMF307 KOH May Bay watch. Please read this manual thoroughly before using your watch to ensure optimal performance and longevity.
The Nautica NAPKMF307 KOH May Bay watch features a 46mm case with a fixed octagonal bezel, offering a distinct design. It comes with both a recycled stainless-steel bracelet and a comfortable light blue silicone strap, allowing for versatile styling. The watch is designed for durability and functionality, including water resistance up to 100 meters (330 feet).
Product Overview
Key features of your Nautica NAPKMF307 watch include:
- Case: Silver Tone 46mm recycled (90%) stainless steel case with mineral glass crystal.
- Dial: Black dial with three-hand movement and luminous infill on hands for visibility in low light.
- Straps: Adjustable recycled (85%) stainless steel bracelet and a 22x20mm light blue silicone strap. Both fit up to an 8-inch wrist circumference.
- Crown: Screw-down crown for enhanced water resistance.
- Case Back: Screw-down case back.
- Water Resistance: Water-resistant to 100 meters (330 feet).
Setup
1. Unboxing and Initial Inspection
Carefully remove the watch and its accessories from the packaging. Inspect the watch for any visible damage. The box set includes the watch with a stainless steel bracelet, an additional silicone strap, and a strap changing tool.

Figure 1: Nautica NAPKMF307 watch set, including the watch, an extra silicone strap, and a strap changing tool.
2. Setting the Time
- Unscrew the Crown: Locate the crown on the right side of the watch case. Gently unscrew it counter-clockwise until it springs out to position 1.
- Pull to Position 2: Carefully pull the crown out further to position 2. The second hand will stop.
- Set Time: Turn the crown clockwise or counter-clockwise to set the hour and minute hands to the correct time.
- Push and Screw Down: Once the time is set, push the crown back into position 1 and then screw it clockwise firmly against the case to ensure water resistance.
Note: Always ensure the crown is fully screwed down to maintain the watch's water resistance rating.
3. Changing the Strap
Your watch comes with two interchangeable straps: a stainless steel bracelet and a silicone strap. To change the strap:
- Prepare: Place the watch face down on a soft cloth to prevent scratches.
- Remove Current Strap: Use the provided strap changing tool to depress the spring bar on one side of the strap, then gently pull the strap away from the lug. Repeat for the other side and the other half of the strap.
- Attach New Strap: Insert one end of the spring bar into the lug hole. Using the tool, depress the other end of the spring bar and guide it into the opposite lug hole. Ensure the strap is securely fastened by gently pulling on it.

Figure 2: Nautica NAPKMF307 watch fitted with the stainless steel bracelet.

Figure 3: Nautica NAPKMF307 watch fitted with the light blue silicone strap.
Operating the Watch
Timekeeping
Your Nautica NAPKMF307 watch is a quartz movement timepiece, providing accurate timekeeping. The watch displays hours, minutes, and seconds via three central hands.

Figure 4: Detailed view of the watch dial, highlighting the luminous hands and markers.
Water Resistance (100m / 330ft)
This watch is water-resistant to 100 meters (330 feet). This rating makes it suitable for swimming, snorkeling, and recreational diving. However, it is not suitable for scuba diving or high-impact water sports.
- Always ensure the crown is fully screwed down before any contact with water.
- Do not operate the crown or pushers (if any) while the watch is wet or submerged.
- Avoid exposing the watch to extreme temperature changes, such as moving from a hot sauna directly into cold water, as this can compromise seals.
Maintenance
Cleaning Your Watch
- Case and Bracelet: Wipe with a soft, damp cloth. For stainless steel, a mild soap solution can be used, followed by rinsing with clean water and drying thoroughly.
- Silicone Strap: Wash with mild soap and water, then rinse and dry completely.
- Avoid Chemicals: Do not use harsh chemicals, solvents, or abrasive cleaners, as these can damage the watch's finish or seals.
Battery Replacement
The watch is powered by a quartz movement, which requires a battery. The typical battery life is 2-3 years. When the battery needs replacement, it is highly recommended to take your watch to an authorized service center or a reputable watchmaker. This ensures proper battery installation and re-sealing of the case to maintain water resistance.

Figure 5: Rear view of the watch, showing the screw-down case back.
Water Resistance Checks
Over time, the gaskets that ensure water resistance can degrade. It is recommended to have your watch's water resistance checked by an authorized service center every 2-3 years, especially if you frequently expose it to water.
Troubleshooting
- Watch Not Running:
- Check if the crown is fully pushed in and screwed down.
- The battery may be depleted. Refer to the "Battery Replacement" section.
- Time Inaccuracy:
- Ensure the time was set correctly and the crown is fully screwed down.
- Extreme temperatures or strong magnetic fields can affect quartz accuracy.
- If inaccuracy persists, the battery may be low, or the movement may require servicing.
- Condensation Under Crystal:
- This indicates a loss of water resistance. Immediately take the watch to an authorized service center to prevent further damage.
For issues not covered here, please contact Nautica customer support or an authorized service center.
Specifications
| Model Number | NAPKMF307 |
| Case Material | Recycled Stainless Steel (90%) |
| Case Diameter | 46 Millimeters |
| Case Thickness | 12.22 Millimeters |
| Crystal | Mineral Glass |
| Movement Type | Quartz |
| Water Resistance Depth | 100 Meters (330 Feet) |
| Strap Material | Stainless Steel Bracelet (Recycled 85%) and Silicone Strap |
| Band Width | 22 Millimeters |
| Clasp Type | Foldover Clasp (Bracelet), Buckle (Silicone Strap) |
| Dial Color | Black |
| Additional Features | Glow In The Dark (Luminous Hands) |
| Manufacturer | Timex |
Warranty and Support
Warranty Information
Your Nautica NAPKMF307 watch comes with a Limited Warranty. This warranty typically covers manufacturing defects in materials and workmanship under normal use. It does not cover damage resulting from improper handling, accidents, unauthorized repairs, or normal wear and tear.
For specific details regarding the terms and conditions of your warranty, please refer to the warranty card included with your watch or visit the official Nautica website.
Customer Support
If you require assistance, have questions about your watch, or need to arrange for service, please contact Nautica customer support. Contact information can typically be found on the official Nautica website or in the documentation provided with your watch.
When contacting support, please have your watch model number (NAPKMF307) and purchase details readily available.





