Specifically, they wore the reference 310.30.42.50.01.001 aka the Speedy with a hesalite crystal (thank goodness it was hesalite) and the new METAS-certified 3861 movement. But these weren't off-the-rack models. Omega donated the timepieces for the mission (as if Bezos was somehow unable to afford them) and made a few cosmetic tweaks for the occasion.
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