This vintage find is a Pulsar model P2, also called the Astronaut. Pulsar made a lot of these so-called “computer watches” in the early ’70s, with the P2 arriving in 1972. By tapping the button on the side of the case (where a crown would normally be), the wearer could light up the red LED diodes to display the time. Roger Moore notably sports a P2 at the beginning of the James Bond movie Live and Let Die, forgoing the Rolex Submariner worn by Sean Connery. Today the watch looks a little kitschy, but in the early 1970s it must have looked as if it had arrived from the space age.