Pierce 134 hammer spring (model 1, movement with 2 pushers) / part 385

Pierce 134 chronograph hammer spring (model 1 for movement with 2 pushers)  / part 385

Ressort de marteau (modèle 1 pour mouvement à 2 poussoirs)

Be aware it exists 2 models for hammer spring, please looks carrefuly pictures

Pre-used / Pre-owned