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    • Was the pallet secured in place with the pallet bridge when the mainspring unwound suddenly or was the bridge removed or loose?  Since all the mainspring power was suddenly let down, you have to check for broken pivots in the escape wheel as well as in the pallet.  If this is the case you will need a jeweling tool in order to get the lower escape wheel jewel back in place. If the entry pallet jewel is out of place, it can be moved, but you will need to measure the appropriate distance from the escape wheel tooth in both the locking phase and impulse phase. This can be done "by eye" or with a dedicated measuring tool. You will also need to learn how to work Shellac in order to adjust that jewel. 🙂 Your enthusiasm for solving this problem is wonderful!! Even if you buy a new movement (which is my recommendation), keep working on this one until you find the problem. It's the best way to learn in watch repair and watch making.  Regards,  Guido
    • here is an original Seiko NH35a, looks the same.
    • Welcome on WRT, ask and you will finf..., enjoy
    • I read about Naphtha and found this which i found alarming...., don't know if it is the same? Solvent naphtha (petroleum), heavy arom. A complex combination of hydrocarbons obtained from distillation of aromatic streams. It consists predominantly of aromatic hydrocarbons having carbon numbers predominantly in the range of C9 through C16 and boiling in the range of approximately 165°C to 290°C (330°F to 554°F). Regulatory process names 12  Translated names 55  IUPAC names 48  Trade names 6  Other identifiers 2  Print infocard Open Brief Profile Open Substance Regulatory Obligations Substance identity EC / List no.: 265-198-5 CAS no.: 64742-94-5 Mol. formula: Hazard classification & labelling Danger! According to the harmonised classification and labelling (CLP00) approved by the European Union, this substance may be fatal if swallowed and enters airways. Additionally, the classification provided by companies to ECHA in REACH registrations identifies that this substance is fatal if inhaled, is very toxic to aquatic life with long lasting effects, is very toxic to aquatic life, causes damage to organs through prolonged or repeated exposure, may cause genetic defects, may cause cancer, is a flammable liquid and vapour, is harmful if swallowed, causes serious eye irritation, is suspected of causing cancer, is suspected of damaging fertility or the unborn child, is harmful in contact with skin, causes skin irritation, may cause drowsiness or dizziness, may cause respiratory irritation and may cause an allergic skin reaction.
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