A recent Week On The Wrist introduced you to this atypical chronograph, often in the shadow of the mythical reference A386. Yet, there is a lot to like in the El Primero reference A3817, from the original El Primero 3019PHC movement to the characteristic dial with oversized sub-dials. One cannot stress enough the technical revolution that Zenith brought with the El Primero movement in 1969: the manufacture did not only achieve one of the first automatic chronograph calibers, it was also the first fast-beat, full rotor, fully integrated automatic chronograph. And this innovation was matched dial-side with an attractive mix of colors, emphasizing the chronograph function. Here, the tonneau case shows clear sign of previous polishing, but this is to be expected in a watch going back to almost a half century. Note that it comes with a replacement crown.

This El Primero A3817 was just listed on eBay here; at the time of publishing bidding had just started at $4,000.