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This is a genuine Ronda 751 circuit block electronic module, a Swiss-made component for the Ronda 751 two-hand quartz movement. It serves as the core control component of the movement, generating precise 32,768Hz quartz oscillation signals to drive the stepper motor for accurate timekeeping. The module features approximately 70% power saving when the stem is pulled, significantly extending battery life. This product is brand new and original, intended for repairing movements that fail to run due to circuit failure.
Brand：Ronda (Swiss)
Part Number：3612.162.RK (751/751E)
Compatible Movement：751 two-hand quartz caliber (5½ × 6¾ ligne)
Origin：Swiss Made (4 jewels, gilt) / Swiss Parts (1 jewel, nickel)
Quality：Genuine original, brand new
Function：Generates and processes time signals, drives stepper motor
1. Is this circuit module an original Ronda genuine part?
Yes. It is an original Ronda factory part (Part No. 3612.162.RK), compatible with the 751 two-hand movement.
2. Which movements is this circuit module compatible with?
It fits the Ronda 751 two-hand quartz caliber (5½×6¾ ligne, approx. 13.00×15.55mm, 2.50mm height). The 751 is a two-hand, no-date movement with one crown position for time setting.
3. What are the symptoms of circuit module failure?
The circuit module is the core control component of the movement. Common symptoms include: movement not running after battery replacement, noticeable time gain/loss, or intermittent stoppage. The 751 offers accuracy of -10/+20 seconds/month with a battery life of approximately 7 years.
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