While Omega named this watch the 'First Omega in Space', it notably lacks any mention of the 'Moonwatch' on its case. This is because it pays homage to the CK2998, which was worn on Walter Schirra's wrist during the Mercury Program. Unlike the later Moonwatch, it lacks crownguards, making the pushers and crown a more prominent feature on the case. Moreover, it's sized at 39.7mm like the original, unlike the Moonwatch's 42mm case. Finally, the dial features the eye-catching 'Alpha' hands. These features combine to create a Speedmaster that's subtly different from the Moonwatch, while being an excellent design in itself.