---
description: Genuine Ronda 585 coil block, Swiss made. For Ronda 585 3-hand date stepper drive, converts pulses to magnetic force, fits 362 battery.
title: Ronda Coil Block 585 - Sofly
image: https://www.soflypart.com/wp-content/uploads/2019/05/585CO.jpg
---
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- **Ronda Coil Block 585**
[](https://www.soflypart.com/wp-content/uploads/2019/05/585CO.jpg)
[](https://www.soflypart.com/wp-content/uploads/2019/05/585COB.jpg)
# Ronda Coil Block 585
$3.00
You Saved
| Brand | Choose an option Ronda- 
Clear |
| --- | --- |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 4 | — | $3.00 |
| 5 - 9 | 5% | $2.85 |
| 10+ | 10% | $2.70 |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 4 | — | $3.00 |
| 5 - 9 | 5% | $2.85 |
| 10+ | 10% | $2.70 |
Ronda Coil Block 585 quantity
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- Covers 99% of Repair Needs
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## Product Description
This is a **genuine Ronda 585 coil block**, a **Swiss-made** component for the **Ronda 585 powertech quartz caliber**. It serves as the **core drive 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 repairing movements that fail due to open circuits, short circuits, or corrosion damage to the coil.
## Specifications
- **Brand**：Ronda (Swiss)
- **Compatible Movement**：**Ronda 585** powertech quartz caliber (8¾ ligne)
- **Origin**：**Swiss Made** / **Swiss Parts**
- **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 585 caliber.
**2. Which movements is this coil block compatible with?**
It fits the **Ronda 585 quartz movement** (8¾ ligne, 20.00mm total diameter). The 585 is a **3-hand with date** movement, available with date window at **3 o’clock or 6 o’clock**. The coil block is universal across variants, though the date driving mechanism may differ.
**3. How do I check if the coil is faulty?**
Use a multimeter to measure resistance across the two coil contacts. Normal reading is approximately **1.75–1.95 kΩ**. An “OL” reading (open circuit) or very low resistance indicates a faulty coil. Other symptoms include: **movement not running after battery replacement**, **irregular seconds hand motion**, or **noticeable time gain/loss**.
## 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 drive 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 repairing movements that fail due to open circuits, short circuits, or corrosion damage to the coil. Specifications Brand\uff1aRonda (Swiss) Compatible Movement\uff1aRonda 585\u00a0powertech quartz caliber (8\u00be ligne) Origin\uff1aSwiss Made\u00a0/\u00a0Swiss Parts 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 585 caliber.\u00a0 2. Which movements is this coil block compatible with? It fits the\u00a0Ronda 585 quartz movement\u00a0(8\u00be ligne, 20.00mm total diameter). 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