The basic design, function and aesthetics of the mechanical chronograph have remained largely unchanged since Breitling patented the independent-reset push-piece in 1934. Starting, stopping and resetting have been done with those distinctive buttons on the side of the case ever since. There have been the odd variations, like Jaeger-LeCoultre’s Aston Martin-themed (and priced) AMVOX chronograph, which controlled functions with a press of the crystal. And some brands have gone retro with integrated crown-mounted monopushers. But by and large, the archetype of the chrono has been two stalks straddling the crown. So when Ball Watch introduced its Engineer Master II Slide Chronograph, which dispenses with pushers altogether, it was nothing short of an evolution of the species.http://gearpatrol.com/2015/08/11/review-ball-engineer-master-ii-slide-chronograph/

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