Sunon SL28 Quartz Movement 3-Hand Calendar Date 23.70mm
Sunon SL28 (SL28-6) Quartz Clock Movement – 3-Hand Day/Date
Keep your clocks running accurately with this brand-new Sunon SL28 quartz movement. Featuring a three-hand design with a sweeping seconds hand and a built-in day/date calendar wheel, this compact module is a reliable, cost-effective replacement for the 2115-20z movement and similar units. Whether you're a watchmaker, hobbyist, or DIY clock restorer, this movement delivers consistent timekeeping in a slim, easy-to-install package.
Key Features
- 3-Hand Day/Date Function: Displays hours, minutes, and a sweep second hand alongside a calendar date wheel for full timekeeping functionality.
- Compact Dimensions: Diameter Φ23.70 mm, Height 4.15 mm — fits a wide range of clock and watch cases.
- Accuracy: ±60 seconds per month for dependable everyday timekeeping.
- Date Wheel: Black English-font date display for clear, easy reading.
- Compatible Replacement: Direct substitute for the 2115-20z movement and comparable quartz modules.
- Brand New & High Quality: 100% new manufacture — not refurbished or reconditioned.
Specifications
| Model | Sunon SL28 / SL28-6 |
| Type | Quartz Movement |
| Functions | 3 Hands (H/M/S sweep), Day/Date Calendar |
| Diameter | Φ23.70 mm |
| Height | 4.15 mm |
| Accuracy | ±60 sec/month |
| Date Wheel Color | Black |
| Date Wheel Font | English |
| Country of Origin | Made in Mainland China |
Who Is This For?
This movement is ideal for clock and watch repair technicians, hobbyists building custom clocks, and anyone seeking a budget-friendly replacement for a worn-out or damaged quartz module. Its slim profile and standard sizing make installation straightforward with basic watchmaking tools.
For general guidance on clock mechanisms and timekeeping standards, visit the NIST Time & Frequency Division — the national authority on accurate timekeeping.
Frequently Asked Questions
Q: Is the Sunon SL28 quartz movement compatible with 2115-20z movement cases?
A: Yes. The Sunon SL28 / SL28-6 is designed as a direct replacement for the 2115-20z movement and other movements with similar dimensions (Φ23.70 mm diameter, 4.15 mm height), making it a straightforward swap in most compatible clock and watch cases.
Q: Does this quartz movement include a calendar date function?
A: Absolutely. The SL28-6 features a full 3-hand layout — hour, minute, and sweep second — plus a day/date calendar wheel printed in black English font, giving you complete timekeeping and date display in one compact module.
Q: What tools do I need to install this quartz clock movement?
A: Basic watchmaking or clock repair tools are typically sufficient — hand-setting tools, a movement holder, and a case opener. The movement's standard sizing means it seats securely into compatible cases without modification in most instances.
Q: How accurate is the Sunon SL28 quartz movement?
A: The movement is rated at ±60 seconds per month, which is typical performance for an entry-level quartz replacement module — suitable for decorative clocks, DIY projects, and everyday household use.