Watch on the moon: Omega pop-up marks 50th year of Apollo 11 mission

In this July 20, 1969 photo made available by NASA, astronaut Buzz Aldrin, lunar module pilot, walks on the surface of the moon during the Apollo 11 extravehicular activity. Photo: Neil Armstrong/NASA via AP

On July 20, 1969, United States astronauts Neil Armstrong and Buzz Aldrin were the first men to step on the moon.

Armstrong and Aldrin both had Omega Speedmasters strapped on, making it the first watch worn on the moon.