How many chronograph nuts do we have in the house tonight? Judging by our loyal following of Speedmaster fans, I'd venture to guess quite a few. But whether you love you some sub-dials or just prefer a nice three-hander, we all know what a chronograph's main job is: to record elapsed times.When you think about it, this fairly obvious function that unites all chronographs is nevertheless rather remarkable in the swath of its utility. Need to time something? Anything? It's got you covered. 100m sprinter Jesse Owens's 10.3-second Olympic victory in 1936? Check. A life-saving 14-second fuel burn during the Apollo 13 mission in 1970? Double check. My 6th-grade science teacher's record-setting tri...