Zenith El-Primero 'Rainbow' World Timer first rocketed to space on

first rocketed to space on the wrist of American astronaut Wally Schirra in 1962

” you can certainly wear it on your wrist

this particular Radiomir features a "California" dial with a matching handset

Aside from some light patination from aging on the indices and handset

a beautiful white enamel dial with Roman indices and matching blued steel sword handset

Zenith El-Primero 'Rainbow' World Timer first rocketed to space onThe Zenith El Primero automatic chronograph movement is a worthy contender for the pantheon of the most important mechanical calibres ever manufactured. With a high beat rate, quickset date mechanism, and full body winding rotor, these movements are robust, reliable, and accurate and have powered everything from the iconic A386 chronograph to the Rolex Daytona, plus a bevy of lesser known models from brands such as Movado and Waldan. In the 1990s,