Up for sale is a highly collectible and pristine **Seiko Precision QC-6M3 Marine Quartz Crystal Master Clock**. Originally designed for industrial vessel deployment to synchronize shipboard slave clocks, this high-precision timepiece is a marvelous example of Japanese horological and maritime engineering.

This specific unit has been sourced, inspected, and **fully tested by Marine-Supply specialists**, making it an exceptional find for serious nautical collectors, clock enthusiasts, or active maritime operators.

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## 📋 Item Condition: Used / Very Good

* **Mechanical Functionality:** 100% operational. Fully tested and verified by Marine-Supply. The quartz crystal movement runs smoothly and keeps exceptional, precise time. 

* **Cosmetic Condition:** Very Good vintage condition. The dial face is remarkably clean and highly legible. The exterior housing shows only minor, superficial signs of wear (faint scuffs/cosmetic character) consistent with light marine service. No major dents or structural damage.

* **Battery/Terminal Compartment:** Clean, free of historical battery leakage, and free of terminal corrosion. 

*> Note: Please review the high-resolution photo gallery to inspect the exact cosmetic condition of the clock casing, terminals, and dial before purchasing.*

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## ⚙️ Technical Specifications

| Feature | Specification |

| :--- | :--- |

| **Brand** | Seiko Precision Inc. (Seikosha) |

| **Model / MPN** | QC-6M3 |

| **Type** | Quartz Crystal Master Clock (GMT-CT) |

| **Origin** | Made in Japan |

| **Power Supply (AC)** | 100V ~ 230V AC, 50/60Hz, 31VA |

| **Power Supply (DC)** | 24V DC, 1A |

| **System Sync** | Analog / Digital Slave synchronization capabilities |

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## 📦 What’s Included

* 1 x Seiko Precision QC-6M3 Marine Master Clock Unit

* *

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## ✈️ Shipping & Handling Policies

* **Professional Packaging:** We understand the fragility and value of vintage marine clocks. This item will be packed with heavy-duty bubble wrap, double-walled boxes, and secure padding to ensure it arrives safely.

* **Worldwide Shipping:** We ship globally using premium carriers (DHL Express / FedEx / UPS) with full tracking and signature confirmation.

* **Customs & Duties:** International buyers are responsible for any applicable import taxes, customs duties, or brokerage fees imposed by their respective countries. 

* **Dispatch Time:** Ships within 1 business days of cleared payment.

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### 🛡️ Buy With Confidence

Your satisfaction is our priority. Item is covered by eBay Buyer Protection. If you have any technical questions or require specific photo angles of the internals/terminals, please send us a message and we will gladly assist you!