The Breitling Chronomat, a watch synonymous with aviation heritage and robust design, demands meticulous care. Its intricate mechanism, especially in models featuring a GMT complication and luminescent hands, requires specialized knowledge for repair and maintenance. This article delves into the potential issues surrounding a Breitling Chronomat, specifically focusing on a reported problem with a recently acquired ref. B13048, which includes a malfunctioning manual winding mechanism and concerns about the GMT hand. We'll examine the potential causes, troubleshooting steps, and the process of professional repair, drawing upon the manuals for the Breitling Chronomat, Breitling GMT 40, and Breitling Chronograph to provide a comprehensive understanding.
The Case of the Non-Winding Chronomat Ref. B13048:
The owner's report of a non-functional manual winding mechanism on their recently purchased Breitling Chronomat ref. B13048 immediately raises several red flags. While the seller's claim of having checked the watch is a positive sign, it's crucial to understand the potential issues that can cause this problem. The lack of winding could stem from a variety of factors, ranging from simple user error to more complex mechanical failures requiring professional intervention.
Possible Causes of Non-Functional Manual Winding:
* Incorrect Winding Technique: Although seemingly straightforward, the manual winding process can be incorrectly executed. The crown needs to be wound smoothly and consistently, avoiding forceful turns that could damage the mechanism. Consult your Breitling Chronomat manual (B13048 specific instructions, if available) for the correct winding procedure. Excessive force can strip gears or damage the mainspring.
* Mainspring Issues: The mainspring is the heart of the mechanical movement, providing the energy to power the watch. A broken, weakened, or improperly seated mainspring will prevent the watch from winding. This is a common issue in older watches or those subjected to significant shock. Repair requires specialized tools and expertise.
* Winding Stem Problems: The winding stem is the component that connects the crown to the mainspring. A bent, broken, or loose winding stem will prevent the transfer of energy from the crown to the mainspring. This often requires replacement.
* Gear Train Problems: The gear train is a complex system of interconnected gears that transfer energy from the mainspring to the various functions of the watch. Any damage or wear to these gears can interrupt the winding process. Identifying and repairing gear train issues requires a skilled watchmaker.
* Worn or Damaged Pawls: Pawls are small components that engage with the ratchet wheel, preventing the mainspring from unwinding when the crown is not being turned. Worn or damaged pawls can lead to the watch not winding properly or even unwinding on its own.
* Lubrication Issues: Insufficient or improper lubrication of the winding mechanism can cause friction and prevent smooth winding. This is a common cause of winding issues and can be addressed during a service.
* Pre-Existing Damage: The watch may have sustained damage prior to the sale, even if the seller was unaware. This could be from a drop, impact, or other incident.
Investigating the GMT Hand and Luminescence:
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