The Breitling Caliber 15, officially designated B15, represents a significant chapter in the history of Breitling's in-house movements. While not as widely discussed as some of its more famous siblings like the Breitling Caliber 01 or the more recent B01, the Caliber 15 holds a unique place in the brand's horological lineage, showcasing the brand's commitment to precision and reliability within a specific segment of its production. This article delves into the specifications, history (insofar as publicly available information allows), and the broader context of the Caliber 15 within Breitling's wider range of movements, comparing and contrasting it with related calibers, particularly the Breitling Caliber 13. We will also explore the models in which it featured, touching upon the market for pre-owned Breitling chronomats and the overall value proposition of watches powered by this movement.
Specifications of the Breitling Caliber 15 (B15):
The official specifications for the Breitling Caliber 15 are somewhat scarce in readily accessible public information. Breitling's official website, while detailing many of its current movements, doesn't provide a dedicated, comprehensive page for the B15. This scarcity of information is typical for older movements, particularly those that have been superseded by newer, more advanced in-house calibers. However, based on available data from watch forums, collector databases, and watch review sites, we can piece together a general picture:
* Caliber: Breitling 15 (B15)
* Movement Type: Automatic Mechanical
* Base Movement: The exact base movement used by Breitling for the Caliber 15 remains largely unconfirmed. This is common practice for watch manufacturers who modify and enhance base movements from established suppliers. Speculation often points towards a modified ETA movement, a common practice in the industry, but without official confirmation from Breitling, this remains conjecture.
* Functions: The Caliber 15 is primarily an automatic movement, focusing on the accurate display of time. While some variations might have included a date complication, it wasn't a standard feature. It's crucial to note that the Caliber 15 was *not* a chronograph movement. This distinguishes it significantly from calibers like the Breitling Caliber 13, which served as the foundation for many of Breitling's chronographs.
* Power Reserve: A typical power reserve for a movement of this type would be in the range of 38-42 hours, although precise figures for the B15 remain elusive without access to internal Breitling documentation.
* Frequency: The balance wheel frequency, a key indicator of accuracy and precision, is likely to be in the standard range of 28,800 vibrations per hour (4 Hz).
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