Zenith built the Rainbow Flyback model in 1997 based on technical specifications established for the French Air Force. The result was a rugged, high-performance timepiece capable of standing up to the most extreme conditions. The Brand now draws inspiration from this high-precision instrument in presenting a new sporty version, the El Primero Stratos Flyback Rainbow.
The El Primero Stratos Flyback Rainbow is driven by the El Primero Calibre 405 B automatic movement. In 1969, Zenith definitively put its name in the history books by presenting El Primero, the first ever integrated automatic watch, also beating at the exceptional speed of 36,000 vibrations per hour and thus displaying 1/10th second precision. The new El Primero Calibre 405 B naturally beats at the same frequency and offers the same precision, butit is also equipped with a date display, a telemetric scale, and above all with the famous flyback function, closely bound up with the world of aviation. This function enables pilots to stop, start and restart the chronograph at a single press on the push-piece, compared with three presses required for a standard chronograph.
The 45.5 mm steel case is topped by a rotating bezel bearing an aluminium ring. The rounded sapphire crystal is shaped like an astrodome – the dome located on the fuselage’s dorsal ridge to enable astronavigation. The transparent engraved sapphire case-back reveals the mechanism of the world’s most accurate series-produced calibre.
On the dial side, the minutes counter at 3 o’clock appears in colours enabling night-time readings in infrared-lit cockpits, while the hours are displayed at 6 o’clock and the small seconds at 9 o’clock. The white superluminova hour-markers make a striking contrast with the black of the dial and case, while the chronograph sweep seconds hand stands out in red. The inner bezel ring bearing a telemetric scale creates an overall depth effect.
The virile and stylish El Primero Stratos Flyback Rainbow is fitted with a steel bracelet.