No hate..just curios..why did NASA decide to take the Omega Speedy over Rolex ?

[TheVision]

Just watched "First Man" movie on Netflix last night and loved the history and the moon landing bit....tons of camera shots for the speedy as well.

Just curious..what made NASA choose the omega speedy as the moon watch over Rolex when all the popular models like daytona, Explorer, sub, gmt were readily available in 1960s? Was it the hand winding on the speedy that made more sense up in space?

I've owned several Omega in the past (smp old and current gen, planet ocean, Aquaterra) and love the brand ...I had to sell most of it to fund my sub date.

Cheers.