Omega Speedmaster HB-SIA Solar Impulse | Titanium Carbon-Fiber Dial

The Omega Speedmaster HB-SIA Co-Axial GMT Ref.321.90.44.52.01.001 is a distinctive numbered-edition Speedmaster created in connection with Omega’s involvement in the Solar Impulse project. Introduced in 2008, this reference features a substantial 44.25mm titanium case, black carbon-fiber dial, sapphire crystal, fixed tachymeter bezel, and matching titanium bracelet. The lightweight titanium construction and technical dial design give the watch a modern, aviation-inspired character.

The beauty of this reference is its combination of advanced materials and practical complications. The textured carbon-fiber dial is complemented by luminous hands and hour markers, while the additional 24-hour hand allows the wearer to track a second time zone. Along with its GMT function, the watch offers a column-wheel chronograph, date display, small seconds, and tachymeter scale, making it one of the more technically capable Speedmaster models from this era.

Powered by Omega’s automatic Co-Axial Calibre 3603, the watch delivers chronometer-rated performance, column-wheel chronograph operation, and an approximately 52–55-hour power reserve. Its numbered-edition status, Solar Impulse connection, titanium construction, and carbon-fiber dial make the HB-SIA a distinctive choice for collectors seeking a Speedmaster outside the traditional Moonwatch configuration. The included original warranty card gives this example additional collector appeal.

Condition

Please review the photos carefully for an accurate representation. Light scratches, bracelet wear, bezel wear, crystal wear, or other signs of use consistent with age may be present and do not affect functionality. The watch presents well overall with expected wear for its age. Includes original warranty card.

Technical Data

• Reference: 321.90.44.52.01.001

• Model: Speedmaster HB-SIA Co-Axial GMT Chronograph

• Edition: Individually Numbered Edition

• Introduced: Approximately 2008

• Case Diameter: Approximately 44.25mm

• Case Material: Titanium

• Bezel: Fixed Tachymeter Bezel

• Dial: Black Carbon-Fiber Dial

• Hour Markers: Luminous Stick and Dot Hour Markers

• Crystal: Scratch-Resistant Sapphire Crystal

• Caseback: Solid Titanium Caseback

• Water Resistance: Originally rated to 100 meters; water resistance not guaranteed due to age

• Bracelet: Titanium Bracelet

• Movement: Omega Calibre 3603 Automatic Co-Axial Chronometer

• Power Reserve: Approximately 52–55 Hours

• Functions: Hours, Minutes, Small Seconds, Date, Chronograph, GMT/Second Time Zone and Tachymeter

• Included: Original Warranty Card