1. Introduction
Product Overview
The Mondaine A990.CLOCK.16SBB Wall Clock embodies the classic Swiss Railways design, known for its minimalist aesthetic and the distinctive red paddle-shaped second hand. This timepiece is crafted with precision and designed for clear readability, making it a functional and iconic addition to any space.
Key Features
- Iconic Swiss Railways design by Hans Hilfiker.
- Characteristic red second hand.
- Dust resistant construction.
- Robust hardened mineral glass.
- Stainless steel screw-on case back.
- Brushed aluminum case with a white dial.
- 250 mm case diameter.

A front view of the Mondaine A990.CLOCK.16SBB Wall Clock, showcasing its white dial, black hour and minute hands, and the iconic red second hand with a circular tip. The brushed aluminum casing is visible around the dial.
2. Setup
Unpacking and Initial Setup
- Carefully remove the clock from its packaging.
- Inspect the clock for any visible damage.
Battery Installation
The Mondaine A990.CLOCK.16SBB Wall Clock requires one AAA battery for operation. A battery is included with the product.
- Locate the battery compartment on the back of the clock.
- Open the battery compartment cover.
- Insert one AAA battery, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.
Mounting the Clock
This clock is designed for wall mounting.
- Select a suitable location on a wall, ensuring it is stable and can support the clock's weight (approximately 1050 grams or 2.31 pounds).
- Use appropriate wall anchors and screws for your wall type.
- Hang the clock securely using the integrated mounting point on the back.

The Mondaine A990.CLOCK.16SBB Wall Clock displayed on a light-colored wall, illuminated by a soft light from above. A minimalist shelf and decorative items are visible below the clock, demonstrating a typical indoor placement.
3. Operating Instructions
Setting the Time
To set the correct time on your Mondaine Wall Clock:
- Locate the time-setting knob on the back of the clock.
- Gently turn the knob in either direction until the hour and minute hands indicate the desired time.
- The red second hand will begin to move once the battery is correctly installed and the time is set.
4. Maintenance
Cleaning
To maintain the appearance and functionality of your clock:
- Wipe the clock's casing and glass with a soft, dry, lint-free cloth.
- Avoid using abrasive cleaners, solvents, or chemical sprays, as these can damage the finish and components.
Dust Resistance
The clock is designed to be dust resistant. However, regular gentle cleaning is recommended to prevent dust buildup on the surface.
5. Troubleshooting
Common Issues and Solutions
- Clock not running:
- Ensure the AAA battery is installed correctly with the correct polarity.
- Replace the battery with a fresh one.
- Incorrect time display:
- Re-set the time using the setting knob on the back of the clock.
- If the time continues to be inaccurate, replace the battery.
- Second hand detached or not moving smoothly:
- This issue may require professional inspection. Contact customer support for assistance.
6. Specifications
Technical Details
| Feature | Detail |
|---|---|
| Brand | Mondaine |
| Model Number | A990.CLOCK.16SBB |
| Display Type | Analog |
| Case Diameter | 250 mm (9.84 inches) |
| Case Thickness | 42 mm |
| Case Material | Brushed Aluminum |
| Dial Color | White |
| Special Feature | Red Second Hand |
| Glass | Hardened Mineral Glass |
| Back Casing | Stainless Steel Screw-on |
| Power Source | Battery Powered |
| Battery Type | 1 x AAA (included) |
| Mounting Type | Wall Mount |
| Item Weight | 1050 Grams (2.31 pounds) |
| Dust Resistance | Yes |
| Origin | Made in Switzerland |
7. Warranty and Support
Warranty Information
The Mondaine A990.CLOCK.16SBB Wall Clock comes with a 2-year manufacturer's guarantee. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims.
Customer Support
For technical assistance, warranty service, or any questions regarding your Mondaine Wall Clock, please contact Mondaine customer support through their official website or authorized service centers.





