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fhf 909 running slow

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FHF 909 in vintage Lucien Piccard is showing average  +10 sec per day, beat error 0.5 and 210 amplitude in six postions.   Seconds hand is circulating at correct speed.   The problem is the minute and hour hands are drastically slow and often stop.  This is all after I serviced.  Thought it might be binding but the movement never stops or slows.. just the two hands.   The watch sets and winds with ease.    Not sure what could be causing this.  I'm confused...

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    • oils do change viscosity according to temperature..perhaps it has been over oiled?thin and runny at body temperature a little thicker at room temperature? Causing a drag.
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