ETA caliber E61.501
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E61.501 description
ETA Flatline E61.501 PreciDrive
H 1,95 mm
∅ 18,20 mm
Hours, minutes, small second.
End–of–life display (EOL).
9 Jewels.
Autonomy theoretic of battery :
28 months (battery 14,5 mAh) or
39 months (battery 20 mAh).
PreciDrive can achieve a precision which can pass theCOSC chronometer certification, provided the watch is not exposed to impacts, and kept at a temperature of between 20°c and 30°c. This precision can be achieved thanks to the thermo-compensation operating principle, which controls and regulates the motor pulses according to changes in the ambient temperature. By virtue of combining the quartz and integrated circuit in the same waterproof case, the precision is insensitive to moisture.