![]() The amount of energy available is even less than at the fourth wheel, and adding the load of driving the chronograph is potentially even more problematic. The problem is even worse if you try to drive the chronograph off the escape wheel. Balance amplitude can drop significantly when a chronograph is switched on, and if the watch isn't in optimum condition, accuracy can suffer if you leave the chronograph on for long enough. Driving a chronograph from the fourth wheel is already kind of pushing it it's the last conventional wheel in the going train, and stealing energy from the gears at that point means less energy is available to reach the balance. Mr Tornare, take a bow.The reason you don't usually see chronographs driven by the escape wheel is that, generally, it's a terrible idea to try. The Original and quite possibly the best. There are strap options, too, and, of course, given its role in the watch, the El Primero gets its moment in the sun through a gaping sapphire case back. Cool as that was and is, it’s an acquired taste, so the new collection has a more mainstream three-link bracelet design. The 1960s model had a laddered design created by specialist Gay Frères, as seen on some of Zenith’s Chronomaster Revival models recently. One area of difference is the bracelet design. Despite the level of detail, and that its squeezed into a relatively small dial by modern chronograph standards, the read-out is fabulously well balanced and, dare I say it, far clearer than on the Chronomaster Sport. The inner of these still shows 100 segments, now used to break down the ten seconds it takes for the red hand to complete a full tour of the dial the outer, once a tachymeter, now shows the tenths of a second. New to the design is how the two scales around the outside edge of the dial are used.
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