Essential Information on the Omega Speedmaster Watch Model

Omega’s Speedmaster is undoubtedly one of the most iconic chronograph families in horology, boasting an impressive evolution spanning over six decades. This article offers a concise overview of the most significant Speedmaster references, from the original 1950s racing chronograph to the latest models of the 2020s.

### Early Models (1950s–1960s)

- **CK2915 (1957)**: The first Speedmaster, featuring the "Broad Arrow" handset and straight lugs, introduced the tachymeter scale and was designed for racing. - **CK2998 (1959)**: The first Speedmaster with alpha hands, available in both black and white dials. This reference is highly collectible and was also used by NASA astronauts as a personal backup watch. - **ST 105.003 (1963)**: Known as the “Ed White” for its association with astronaut Ed White, who wore it during the first American spacewalk in 1965. Notable for its symmetrical case and straight lugs, this model was part of NASA’s qualification tests. - **ST 105.012 (1964)**: Introduced crown guards and became the direct predecessor to the Moonwatch. This was the reference worn during NASA’s early Gemini missions. - **ST 105.013**: A rare transitional model that prefigured the Professional, featuring a different caseback.

### Professional & Moonwatch (Late 1960s–1980s)

- **ST 105.012 & 145.012 (1964–1969)**: The first Speedmasters officially certified by NASA for manned spaceflight. The 105.012 was the first on the Moon, carried by Apollo 11 crewmembers. - **ST 145.022 (1968–1978)**: The definitive Moonwatch, featuring the “Professional” on the dial, a hesalite crystal, and the Calibre 861 movement. This is the model most closely associated with the Apollo program’s legacy. - **ST 376.0822 (1969–1972)**: The “Alaska Project” prototype, developed in response to NASA’s request for a watch with enhanced thermal resistance.

### Diversification & Modernization (1990s–2010s)

- **3510.50 (1996–2009)**: The Speedmaster Reduced, an automatic model with a smaller 39mm case, popular for those seeking the Speedmaster look in a more compact size. - **3570.50 (2003–2017)**: A direct descendant of the Moonwatch, featuring a sapphire crystal exhibition caseback, honouring the Apollo 11 legacy. - **311.30.42.30.01.005 (2018–)**: The current Speedmaster Professional Moonwatch, combining modern upgrades (co-axial escapement, METAS certification) while retaining classic Moonwatch styling. - **320.30.42.50.01.001 (2018–)**: The Speedmaster Apollo 11 50th Anniversary Limited Edition, celebrating the lunar landing milestone.

### Special Editions & Variants (1980s–2020s)

- **176.001 (1982–1996)**: The Mark II, featuring a tonneau-shaped case, updated design, and automatic movement. - **3550.50 (2003–2009)**: The Broad Arrow (re-issue), which paid homage to the original CK2915 with a modern twist. - **311.30.40.30.01.001 (2019–)**: The Speedmaster Calibre 321 Edition, a limited-run reissue featuring the legendary Calibre 321 movement found in the original Moonwatch. - **Omega x Swatch MoonSwatch (2022–)**: A colourful, affordable, and widely popular quartz collaboration, capturing the Moonwatch design ethos in bioceramic cases.

### Technical Highlights and Features

- **Calibre 321**: The legendary manual-wind chronograph movement used in early Speedmasters, including the ST 105.003 and later reissues. - **Calibre 861/1861**: The workhorse of the Moonwatch for decades, featuring a cam-operated chronograph mechanism. - **Calibre 9300/9900**: Modern co-axial chronograph movements with automatic winding and METAS certification for enhanced precision and anti-magnetism. - **Materials & Sizes**: Speedmasters have been produced in stainless steel, gold, platinum, and ceramic, with case sizes ranging from 38mm to 45mm.

## Summary Table: Key Speedmaster References

| Reference | Era/Name | Notable Features | Movement | |---------------------|---------------------|-----------------------------------------------|--------------------| | CK2915 | 1957 (Broad Arrow) | Original Speedmaster, straight lugs | Cal. 321 | | CK2998 | 1959 (Alpha Hands) | First with alpha hands, used by astronauts | Cal. 321 | | ST 105.003 | 1963 (Ed White) | Worn on first U.S. spacewalk, straight lugs | Cal. 321 | | ST 105.012/145.012 | 1964–1969 (Moon) | First on the Moon, crown guards | Cal. 321 | | ST 145.022 | 1968–1978 | Classic Moonwatch, “Professional” dial | Cal. 861/1861 | | 376.0822 | 1969–1972 | Alaska Project, thermal protection | Cal. 1861 | | 176.001 | 1982–1996 | Mark II, tonneau case, automatic | Cal. 1045 | | 3510.50 | 1996–2009 | Speedmaster Reduced, automatic, 39mm | Cal. 3220 | | 3570.50 | 2003–2017 | Moonwatch with sapphire caseback | Cal. 1861 | | 311.30.42.30.01.005 | 2018– | Modern Moonwatch, co-axial, METAS | Cal. 3861 | | 311.30.40.30.01.001 | 2019– | Calibre 321 Edition, limited reissue | Cal. 321 | | MoonSwatch | 2022– | Bioceramic, quartz, affordable | Quartz |

## Conclusion

The Omega Speedmaster has a storied lineage, evolving from a racing chronograph to a symbol of space exploration and horological innovation. From the groundbreaking CK2915 and “Ed White” ST 105.003, through the Moonwatch ST 145.022, to contemporary models like the Calibre 321 Edition and MoonSwatch, each reference offers a unique chapter in Omega’s history. Collectors and enthusiasts prize these models for their technical achievements, historical significance, and enduring design.

The Speedmaster shared its origins with the realm of racing, as exemplified by the CK2915, introduced in 1957, and the CK2998 unveiled in 1959, both incorporating essential racing features.
Technology and innovation have been integral to the Speedmaster's evolution, with subsequent models like the ST 376.0822 (1969–1972), which represents the "Alaska Project" and was developed in response to NASA's demand for a watch with superior thermal resistance, showcasing this evolution.