Zenith. A Stainless Steel Chronograph Wristwatch with Date
Model: Pilot Big Date Special
El Primero cal. 4010 automatic movement, 31 jewels, black dial, luminous Arabic numerals, luminous hands, outer minute divisions and telemeter scale, two subsidiary dials for 30 minute register and constant seconds, date window at 6 o’clock, circular case, two rectangular chronograph buttons in the band, display back secured by four screws, Zenith stainless steel double deployant clasp, case, dial, and movement signed
From the 1960’s through the 1980’s, Zenith produced chronographs for the Italian Air Force (through the A. Cairelli Company). These military-issued watches featured a black dial, two subsidiary dials for running seconds and a 30 minute counter, and large luminous numerals and hands. The case was a large 45mm, and also had a rotating bezel calibrated to 60 units.
In 2012, Zenith launched the Pilot Big Date Special model, drawing inspiration from the military-issued models of the 1960’s. The case was downsized to 42mm, and did not have a rotating bezel. Neverthless, like the original chronographs, the watch featured a black dial, two subsidiary dials, and luminous hands and Arabic numerals. The addition of a date feature with two windows allows the dial to retain its symmetry. The display back presents the automatic El Primero Caliber 4010 to be viewed, an in-house caliber that was introduced in the mid-2000’s.