Released in 2019, reference 310.20.42.50.01.001 marks the 50th anniversary of the Apollo 11 mission with a 42mm round stainless steel case and a fixed tachymeter bezel crafted from Omega's proprietary 18k Moonshine Gold — an alloy developed for enhanced long-term color stability. The grey dial carries the commemorative inscription, while the solid case back is engraved with the Apollo 11 mission insignia.
Powering the watch is the manually wound Calibre 3861, the first Speedmaster movement to earn METAS Master Chronometer certification, offering a power reserve of approximately 50 hours. Scratch-resistant sapphire crystal and 50 metres of water resistance round out the case specification.
The stainless steel Oyster-style bracelet fastens via a push-button folding clasp. A chronograph and tachymeter serve as the functional complications, and the watch was produced as a strictly limited run tied to this specific NASA milestone — a distinctive configuration within the broader Speedmaster lineup.
