Quick Rule of Thumb: Sm.Seconds at 3=ETA/DD combo.
: trying to verify some information on this T-H
: chrono (ref#CH5110.BA0675). i have anecdotal
: evidence that it is one of the early T-H
: pieces to be fitted w/ the zenith el primero
: movement (now called the calibre 36). if so,
: it looks like it might be a silly deal for
: me.
Quick Rule of Thumb: Just about every Chronograph which has the Small Seconds register at 3 o'clock is utilizing the ETA 289x/Dubois-Depraz Piggy-Back Chronograph Module combination... It's one of the first things I look for on a "Tri-Compax" layout chronograph. If the Small Seconds is at 3, a sharp snorting exhalation, and I move on...
-- Chuck