Introduction
This manual provides essential instructions for the setup, operation, and maintenance of your AVI-8 Spitfire Lock Chronograph Watch, model AV-4089-04. Please read this manual thoroughly to ensure proper use and to maximize the lifespan of your timepiece.
Product Overview
The AVI-8 Spitfire Lock Chronograph is a men's pilot watch featuring a Japanese Meca-Quartz movement. It combines classic aviation-inspired design with modern chronograph functionality.

Image: Front view of the AVI-8 Spitfire Lock Chronograph watch, showcasing the blue dial and leather strap.
Watch Components
- Crown: Used for setting time and date.
- Pushers (A & B): Used for operating the chronograph functions.
- Hour, Minute, Second Hands: Indicate current time.
- Chronograph Second Hand: Large central hand for stopwatch seconds.
- Chronograph Minute Sub-dial: Tracks elapsed minutes during chronograph operation.
- 24-Hour Sub-dial: Indicates time in a 24-hour format.
- Date Window: Displays the current date.

Image: Diagram illustrating key features of the AVI-8 Lock Chronograph, including case material, movement type, bezel, lens, crown, case diameter, water resistance, and band material.
Video: An overview of the AVI-8 4089-04 watch, demonstrating its design and features.
Setup
Setting the Time
- Pull the crown out to position 2.
- Turn the crown to move the hour and minute hands until the desired time is set. Ensure the 24-hour sub-dial also reflects the correct AM/PM.
- Push the crown back into position 0.
Setting the Date
- Pull the crown out to position 1.
- Turn the crown clockwise to adjust the date.
- Once the correct date is displayed, push the crown back into position 0.
Note: Avoid setting the date between 9:00 PM and 3:00 AM, as this may damage the movement. If the date needs adjustment during this period, first set the time outside this range, adjust the date, then reset the time.
Chronograph Hand Zero Reset
If the chronograph second hand or minute sub-dial hands do not return to the zero position after resetting, follow these steps:
- Pull the crown out to position 2.
- Press pusher A to advance the chronograph second hand. Press pusher B to advance the chronograph minute hand. Adjust until both hands are aligned to the 12 o'clock (zero) position.
- Once aligned, push the crown back into position 0.
Operating the Chronograph
The chronograph function allows you to measure elapsed time.
- Start: Press pusher A to start the chronograph. The central chronograph second hand and minute sub-dial will begin to move.
- Stop: Press pusher A again to stop the chronograph. The elapsed time will be displayed.
- Reset: After stopping, press pusher B to reset the chronograph hands to their zero positions.
- Split Time (Intermediate Measurement): While the chronograph is running, press pusher B to take a split time. The hands will freeze, showing the intermediate time. Press pusher B again to resume timing from where it left off. Press pusher A to stop, then pusher B to reset.
Maintenance
Cleaning
Regularly wipe your watch case and strap with a soft, dry cloth to remove dust and moisture. For the leather strap, avoid excessive moisture and direct sunlight to prevent damage and discoloration.
Water Resistance
This watch is water resistant to 50 meters (5 ATM / 165 feet). This rating means it is suitable for short periods of recreational swimming, but not for diving or prolonged submersion. Do not operate the crown or pushers when the watch is wet or submerged, as this can compromise the water resistance.
Battery Replacement
The watch is powered by a product-specific battery. When the battery is low, the second hand may jump in 2-second intervals as a low battery indicator. Battery replacement should be performed by a qualified watch technician to ensure proper sealing and maintain water resistance.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Watch not running | Battery depleted | Replace battery by a professional. |
| Time is incorrect | Time not set correctly or crown pulled out | Set the time as per 'Setting the Time' instructions. Ensure crown is fully pushed in. |
| Date is incorrect | Date not set correctly | Set the date as per 'Setting the Date' instructions. |
| Chronograph hands do not reset to zero | Misalignment | Perform 'Chronograph Hand Zero Reset' procedure. |
Specifications
- Model Number: AV-4089-04
- Movement: Japanese Meca-Quartz Chronograph
- Case Material: Stainless Steel
- Case Diameter: 42 mm
- Case Thickness: 12 mm
- Band Material: Genuine Leather
- Band Width: 22 mm
- Band Length: 210 mm
- Crystal: Mineral with Anti-Reflective Coating
- Water Resistance: 50 Meters (5 ATM / 165 Feet)
- Weight: 90 Grams (3.17 ounces)
- Display Type: Analog
- Clasp Type: Buckle
- Power Source: Battery Powered
Warranty and Support
Your AVI-8 Spitfire Lock Chronograph watch is covered by a Two (2) Year International Warranty from the date of purchase against manufacturing defects. This warranty does not cover normal wear and tear, accidental damage, or damage resulting from improper use or unauthorized repairs.
For warranty claims or technical support, please refer to the warranty card included with your purchase or visit the official AVI-8 website for contact information.

