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This is a genuine Ronda coil block for 762/763/751/753 movements, a Swiss-made component for Ronda Normtech quartz calibers. It serves as the core electromagnetic component of the stepper motor, converting electrical pulses into magnetic energy to drive the gear train and precisely control seconds hand stepping for accurate timekeeping. This product is brand new and original, designed for movements where the original coil has failed due to moisture, battery leakage, or open/short circuits.
Brand：Ronda (Swiss)
Part Number：4060 / 3621.014
Compatible Movements：762, 763, 751, 753 Normtech series quartz calibers
Origin：Swiss Made / Swiss Parts
Quality：Genuine original, brand new
Function：Converts electrical pulses to magnetic energy for stepper motor
Coil Resistance：1.425–1.575 kΩ
Accuracy：-10/+20 seconds/month
1. Is this coil block an original Ronda genuine part?
Yes. It is an original Ronda factory part (Part No. 4060 / 3621.014), compatible with Ronda 751/753/762/763 movements.
2. Are the 751/753 and 762/763 coils interchangeable?
Yes. According to Ronda official technical data, this coil block (4060) fits 751, 751E, 752, 753, 762, and 763 movements. All four calibers belong to the Normtech product line—the coil is fully interchangeable.
3. How do I check if the coil is faulty?
Use a multimeter to measure resistance across the two coil contacts. Normal reading: 1.425–1.575 kΩ. An “OL” reading (open circuit) or very low resistance indicates a faulty coil. Ronda technical data specifies measuring without the battery installed.
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