---
description: Genuine Ronda 1042 coil block, Swiss made. Core stepper drive for 10.40mm ultra-small movement, converts pulses to magnetic force, fits 335 battery.
title: Ronda Coil Block 1042 Quartz Movement Component - Sofly
image: https://www.soflypart.com/wp-content/uploads/2019/05/1042CO.jpg
---
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- **Ronda Coil Block 1042 Quartz Movement Component**
[](https://www.soflypart.com/wp-content/uploads/2019/05/1042CO.jpg)
[](https://www.soflypart.com/wp-content/uploads/2019/05/1042COB.jpg)
# Ronda Coil Block 1042 Quartz Movement Component
$4.00
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| Brand | Choose an option Ronda- 
Clear |
| --- | --- |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 4 | — | $4.00 |
| 5 - 9 | 5% | $3.80 |
| 10+ | 10% | $3.60 |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 4 | — | $4.00 |
| 5 - 9 | 5% | $3.80 |
| 10+ | 10% | $3.60 |
Ronda Coil Block 1042 Quartz Movement Component quantity
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## Product Description
This is a **genuine Ronda 1042 coil block**, a **Swiss-made** component for the **Ronda 1042 4¼”’ ultra-small quartz movement**. It serves as the **core electromagnetic component** of the stepper motor, converting electrical pulses from the circuit board into magnetic force to drive the gear train for precise timekeeping. This product is **brand new and original**, intended for servicing and repair of 1042 movements.
## Specifications
- **Brand**：Ronda (Swiss)
- **Compatible Movement**：**1042** Slimtech series (4¼”’, approx. 10.40mm)
- **Origin**：**Swiss Made** (5 jewels, gilt) / **Swiss Parts** (5 jewels, nickel)
- **Quality**：**Genuine original**, brand new
- **Function**：**Converts electrical pulses to magnetic force** for stepper motor
## FAQ
**1. Is this coil block an original Ronda genuine part?**
**Yes**. It is an **original Ronda factory part** from Switzerland, designed for the 1042 Slimtech ultra-small movement.
**2. Which movements is this coil block compatible with?**
It fits the **Ronda 1042 two-hand quartz movement** (4¼”’, 10.40mm diameter, 2.90mm height). The 1042 is a **two-hand, no-date** movement with one crown position for time setting. It is the smallest Slimtech caliber, designed for **ultra-small ladies’ watches and jewelry watches**.
**3. What are the symptoms of coil block failure?**
The coil block is the **core drive component** of the movement. Common symptoms include: **movement not running after battery replacement**, **noticeable time gain/loss**, or **intermittent stoppage**. The 1042 offers accuracy of **-10/+20 seconds/month** and can use either standard 335 or high-capacity 317 batteries. **Timely replacement** is recommended.
## Why Choose SOFLY Watch Parts?
**Fast Worldwide Shipping** – Orders are dispatched within 3 business days.
**Competitive Pricing** – Great value across watch movements, replacement parts and watchmaking tools.
**Extensive Selection** – More than 3,000 watch movements, parts and accessories available.
**Trusted Worldwide** – Trusted by watchmakers, repair professionals and watch enthusiasts worldwide.
**Personalized Sourcing** – Can’t find the part you need? Contact **info@soflypart.com** or WhatsApp **+86 18620212114.**
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It serves as the\u00a0core electromagnetic component\u00a0of the stepper motor, converting electrical pulses from the circuit board into magnetic force to drive the gear train for precise timekeeping. This product is\u00a0brand new and original, intended for servicing and repair of 1042 movements. Specifications Brand\uff1aRonda (Swiss) Compatible Movement\uff1a1042\u00a0Slimtech series (4\u00bc''', approx. 10.40mm) Origin\uff1aSwiss Made\u00a0(5 jewels, gilt) /\u00a0Swiss Parts\u00a0(5 jewels, nickel) Quality\uff1aGenuine original, brand new Function\uff1aConverts electrical pulses to magnetic force\u00a0for stepper motor FAQ 1. Is this coil block an original Ronda genuine part? Yes. It is an\u00a0original Ronda factory part\u00a0from Switzerland, designed for the 1042 Slimtech ultra-small movement.\u00a0 2. Which movements is this coil block compatible with? It fits the\u00a0Ronda 1042 two-hand quartz movement\u00a0(4\u00bc''', 10.40mm diameter, 2.90mm height). 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