Delving into the Heart of the Omega Speedmaster: Unveiling the Automatic Calibre 1151 The Omega Speedmaster\, a name synonymous with space exploration and iconic design\, has captured the hearts of watch enthusiasts for decades. While its manual-winding chronograph movements are rightfully celebrated\, the automatic Omega Speedmaster Tachymeter Automatic Calibre 1151 holds a unique place in its history. This article dives deep into this remarkable movement\, providing a detailed look at its schematic\, workings\, and historical significance. Understanding the Omega Speedmaster Tachymeter Automatic Calibre 1151 The Calibre 1151\, launched in 1971\, represented a pivotal moment in the evolution of the Speedmaster. It marked the first time the legendary chronograph was equipped with an automatic winding mechanism\, offering a more convenient and user-friendly experience. A Glimpse into the Calibre 1151 Schematic The schematic of the Calibre 1151 reveals a complex and meticulously crafted mechanism. It consists of 201 components\, a testament to its sophisticated design. Key components include: Automatic Winding System: The Calibre 1151 utilizes a bidirectional rotor system\, which winds the mainspring with each movement of the wrist. This ensures consistent power reserve even without manual winding. Chronograph Mechanism: The chronograph function is based on a column wheel system\, a hallmark of high-quality chronographs. This mechanism allows for precise timing of events with smooth and reliable operation. Tachymeter Scale: The Speedmaster's iconic tachymeter scale is printed on the bezel\, enabling the user to measure average speed over a specific distance. This feature adds practical functionality to the chronograph's capabilities. Behind the Scenes: Exploring the Calibre 1151's Workings Understanding the Calibre 1151's workings requires examining its key components: The Automatic Winding System: The rotor system\, housed at the back of the movement\, is connected to the mainspring via a series of gears and levers. Each rotation of the rotor transfers energy to the mainspring\, keeping it wound and ready to power the watch. The Chronograph Mechanism: The chronograph function is activated by pressing the chronograph pushers. This initiates the column wheel system\, which controls the chronograph hands and allows for accurate time measurement. The Tachymeter Scale: The tachymeter scale is a vital tool for speed calculations. To use it\, start the chronograph when an object passes a fixed point\, then stop it when the object reaches another point. The tachymeter scale on the bezel will indicate the object's average speed based on the time measured by the chronograph. The Historical Significance of the Calibre 1151 The introduction of the Calibre 1151 was a bold move for Omega. It sought to modernize the Speedmaster\, adapting it to the preferences of a broader audience. This transition to an automatic movement marked a significant change in the watch's legacy\, expanding its appeal beyond seasoned collectors. The Omega Speedmaster Tachymeter Automatic Calibre 1151: A Timeless Classic The Omega Speedmaster Tachymeter Automatic Calibre 1151 remains a coveted timepiece for its unique blend of history\, design\, and functionality. The inclusion of an automatic winding system made the Speedmaster more user-friendly\, while maintaining the iconic chronograph features. This innovative design\, coupled with its space-age heritage\, makes it a prized possession for watch enthusiasts worldwide. FAQ Q: What is the power reserve of the Calibre 1151? A: The Calibre 1151 typically has a power reserve of around 44 hours. Q: Is the Calibre 1151 still in production? A: No\, the Calibre 1151 was discontinued in the 1980s. Q: Where can I find more information about the Calibre 1151? A: You can find detailed technical specifications and historical information on the official Omega website\, or through reputable watch forums and online resources. References: Omega Official Website Hodinkee WatchTime Magazine Conclusion The Omega Speedmaster Tachymeter Automatic Calibre 1151 stands as a testament to Omega's innovative spirit and commitment to excellence. Its automatic winding system provided a modern convenience\, while its chronograph and tachymeter functions retained the iconic practicality of the Speedmaster lineage. Its place in watchmaking history is cemented by its unique combination of heritage\, technical advancement\, and enduring style. The Calibre 1151 continues to inspire awe and admiration\, proving that even within the realm of iconic timepieces\, innovation and evolution are constant companions.