Britain's Royal Flying Corps used Omega watches in 1917 for its combat units, followed by the U.S. Army in 1918, and NASA in 1969 for Apollo 11.

In 1894, his two sons Louis-Paul and César developed their own in-house manufacturing and total production control system that allowed component parts to be interchangeable.

[16] The economic difficulties brought on by the First World War led Paul-Emile Brandt to work in 1925 towards the union of Omega and Tissot, then to their merger in 1930 into the group SSIH, Geneva.

Under Brandt's leadership and Joseph Reiser's from 1955, the SSIH Group continued to grow and multiply, absorbing or creating some fifty companies, including Lanco and Lemania, manufacturer of the most famous Omega chronograph movements.

Omega tended to be more revolutionary and more professionally focused, while Rolex watches were more ‘evolutionary’ and famous for their mechanical pieces and branding.

After drastic financial restructuring, the R&D departments of ASUAG and SSIH merged production operations at the ETA complex in Granges.

Renamed Société de Microélectronique et d'Horlogerie (SMH), the new group over the next decade proceeded to become one of the top watch producers in the world.

[17][22][23] In 2019, Omega licensed its name and branding to Marcolin for a collection of men's and women's optical frames and sunglasses.

[28] Observatory trials focused on the science of Chronometry and the ability to make chronometers measure time precisely.

[42] Omega's early prowess in designing and regulating timing movements was made possible by the company's incorporation of new chronometric innovations.

Although Apollo 11 commander Neil Armstrong was first to set foot on the Moon, he left his 105.012 Speedmaster inside the Lunar Module Eagle as a backup because the LM's electronic timer had malfunctioned.

[63][64] Two of these watches were attached to the outside of the Deep-Submergence Vehicle Limiting Factor: one on each of the main vessel's robotic arms and an additional one on the ultra-deep-sea lander Skaff.

That year, Pierce Brosnan took over the role of James Bond and began wearing the Omega Seamaster Quartz Professional (model 2541.80.00) in GoldenEye.

[81] Omega was eager to participate in the high-profile product placement opportunity to further its brand image and supplied the watches.

With the launch of the film in 2006, Omega released a 007-special of the Professional 300M, (model 2226.80.00) featuring the 007-gun logo on the second hand and the rifle pattern on the watch face, based on the gun barrel sequence of Bond movies.

[85] In the 2008 movie Quantum of Solace, Craig wears the Omega Seamaster Planet Ocean with a black face and steel bracelet (42mm version).

Another limited edition was released featuring the checkered "PPK grip" face with the Quantum of Solace logo.

[87] In 2015, two commemorative models were produced for the 24th Bond film, Spectre: the Omega Seamaster 300m master co-axial Ref: 233.32.41.21.01.001.

[89] For the Craig’s final film as James Bond, No Time to Die (2021), Omega once again made a special edition of Omega Seamaster for the film, which based from Seamaster 300 that previously used by Brosnan, but with all the case material made from Grade 2 titanium, rather than the usual stainless steel from the basic models, then the color that chose is brown, and also there’s featured the “broad arrow” British military logo on the front and the engraved back of the case.

[97][98] Omega faced activist pressure to withdraw from being the official timekeepers of the 2022 Beijing Winter Olympics after numerous governments enacted diplomatic boycotts over human rights violations (in particular China's repression of Uyghurs and other minorities, which some countries have designated as a genocide).

[99] Omega defended its continued role as official time keeper of the Olympics by stating its policy to "not to get involved in certain political issues because it would not advance the cause of sport in which our commitment lies.