We all like the three, differently colored sub-dials on a Zenith chronograph, don't we? It's a distinct look for sure. And it stands for something; it clearly says In know my chronographs. But that connoisseur-approved look can also be very present. What if you want something a bit more understated. The distinguished Zenith El Primero 36,000vph Chronograph 42mm with its black dial could just be the chronograph for you.I don't want to step on anyone's toes so I'm not going to make a ranking based on qualities, but I think the unofficial chronograph Top 3 must include the omega Daytona, the Omega Speedmaster, and a Zenith El Primero-powered model. But which El Primero? Is it going to be the El...