Comment arriver à zéro?

[rehajm]

An update on my JL Powermatic- I found an original mainspring for this caliber- the one with the circular end…and decided to replace the GR spring I installed…

…here’s the GR mainspring I installed then removed…

…I don’t see anything wrong with the GR but on disassembly there was significant power remaining after it stopped naturally and I tried to remove any residual power via the (two) clicks. The power wound down quite a bit more after I pulled the pallet fork, like perhaps the 10 hours of reserve the indicator was showing. Perhaps it was a poor job of lubricating the barrel or some error with the clutch mechanism I did not detect during a careful disassembly…

…now I’ve reassembled with the new original spring and the indicator easily synced with the spring power in the way nevenbekriev describes- full wind brought the indicator in sync then it read zero at stop. Thanks!

…so unfortunately I cannot conclude for certain if it was an issue with the length of the replacement spring or a bodge of the first assembly…

…Here it is with the restored dial and hands relumed…

Edited March 27 by rehajm

[fclass308]

That is a beautiful watch.