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This is a genuine Ronda 785 fifth wheel, an original Swiss-made component for the Ronda 785 quartz movement. It serves as a key intermediate gear in the gear train, transmitting power from the center wheel to the seconds wheel and subsequent gear train as an essential component for accurate timekeeping. This product is brand new and original, not a generic replacement part.
Brand：Ronda (Swiss)
Compatible Movement：785 quartz movement (8¾ ligne normtech series)
Part Name：Fifth Wheel (Intermediate Gear)
Origin：Swiss Made (5 jewels, gilt) or Swiss Parts (1 jewel, nickel)
Quality：Genuine original, brand new
Function：Power transmission from center wheel to seconds wheel
1. Is this fifth wheel an original Ronda genuine part?
Yes. It is an original Ronda factory part, Swiss Made.
2. Which movements is this fifth wheel compatible with?
It fits the Ronda 785 series quartz movement, measuring 8¾ ligne (19.40mm) with 2.50mm thickness, featuring hour/minute/seconds hands and date display. Parts are partially interchangeable with 775, 705, 715 movements, but parts from different production periods may not be individually interchangeable—verify against your old part number.
3. What happens if the fifth wheel is damaged?
The fifth wheel is the key intermediate gear of the gear train, positioned between the center wheel and the seconds wheel. Damage can cause timekeeping errors, hand stoppage, or power transmission failure. As a continuously driven component, timely replacement is recommended.
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