Because it beats at a frequency of 36,000 times per hour – twice that of the standard 28,800 vph movements, the seconds hand seems to glide rather than tick.The Zenith A386, announced in January 1969, introduced the El Primero movement, the first automatic chronograph in production with an incorporated automatic chronograph movement. The Zenith El Primero Chronograph A386 was introduced in January of 1969, and c. The mechanism oscillates at a frequency of 36,000 vph (5Hz). It has a dry molybdenum-sulfide based lubrication system, and an embellished tungsten carbide weight segment. It includes a monometallic balance, a self-compensating flat balance spring, and an index regulator.
It's rhodium plated, and it's constructed with 31 jewels, 135 components, an Incabloc anti-shock device, and a straight-line lever escapement. This Zenith El Primero A386 has a mechanical automatic self-winding high beat El Primero caliber 3019 PHC chronograph movement. It has a 50-hour power reserve at full wind, and the 12.8mm thick case, dial, and movement are all signed. It has distinctive tri-color subsidiary dials, including a running seconds indicator at 9 o'clock, a 12-hour chronograph register at 6 o'clock, and there is a 30-miute totalizer at the three o'clock position. There is a perimeter tachymeter to 500 UPH, and inside on a plain black reserve is a 1/10th second ring. A quick set date aperture window is 4 and 5 o'clock. The original silver dial has applied steel faceted luminous baton indexes, skeletonized white baton hands with luminous inserts, and a red center chronograph hand with a rectangular luminous indicator around a minute/one-fifth second scale. The 37mm diameter solid two-body case, hooded lugs, and flat bezel are polished. There is a solid screw-down case back and round chronograph pushbuttons. It has the original integral stainless steel Gay Freres "ladder" bracelet with a deployant clasp, and a scratch resistant domed sapphire crystal. 1969 stainless steel Zenith El Primero Chronograph A386.
More about A386 Vintage El Primero Tri Color RARE SS Circa 1969
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