Omega Speedmaster X-33 Titanium 3290.50.00

Omega produced the X-33 in 1998, NASA qualified it for space missions, and that same year it flew on the Mir space station and on Space Shuttle Columbia during STS-90. It pairs analogue hands with a digital display, and where the Moonwatch has a tachymeter bezel, the X-33 has a rotating 0–60 bezel.

The case is 42 mm across in titanium, takes a 20 mm strap and has a sapphire crystal. The 3990.50.06 is the same first-generation watch on a black Kevlar strap. The second-generation versions keep the same case and dial: the 3291.50.00 on the bracelet and the 3991.50.06, 3991.50.09 and 3991.50.41 on black, green and red Kevlar straps.