Zenith El Primero American or of the Mark XI

or of the Mark XI watches produced by Jaeger-LeCoultre and IWC

If you want an aviation watch

and while these early models were entirely manually wound (the upper crown wound the spring for the alarm function while the lower crown wound the timekeeping mainspring)

The Speedmaster was already known to NASA for its personal use by the astronauts: Wally Schirra wore his own Speedmaster

Much ado has been made about Heuer in recent months

Zenith El Primero American or of the Mark XITo that part of the population who are not Watch Idiot Savants, 1969 marks the year of the moon landing. But to the more horologically inclined, 1969 marked a year of revolution in horology as well. As the Soviets and the U. S. raced to put a man on the moon, watch brands vied against each other to be the first to produce a self winding chronograph drivetrain. On one side of this contest was Hamilton, working with Heuer, Breitling, Dupois Dupraz, and