内容:
322 components: Ebel Caliber 137.
The rate can be finely adjusted via a Triovis adjustment mechanism. And Ebel’s watchmakers have obviously mastered the art of fine adjustment. The 1911 BTR Chronograph gained between one and two seconds per day on the wrist. This admirably accurate performance was confirmed by our timing machine, which determined that the average deviation was just +2 seconds with the chronograph switched off and +3 seconds with the stopwatch function running. The greatest deviation among the several positions was likewise very pleasing: just three or four seconds per day, depending on the status of the chronograph mechanism.
The 1911 BTR Chronograph has rightfully earned an official chronometer certificate from the COSC. … Only the amplitude, which sometimes exceeds 340°, is too high – so high that the balance is in danger of knocking, i.e. swinging so far in one direction that it strikes against the other side. Perhaps the barrel of our test specimen hadn’t been properly lubricated: this would cause the slip-spring, which acts like a friction clutch, to convey too much torque to the gear-train. The high amplitude, however, didn’t create any problems with the rate during a several-day-long empirical test on the wrist.作者: jxfzman 时间: 2010-4-15 17:24:28