Landeron friction spring for chrono runner 48 54 85 86 148 149 154 185 186 187 189 248 254 349 / part 8290 (New)

Landeron 48 friction spring for chronograph runner / Part 8290

Ressort friction du mobile de chronographe

It fits all following calibers :

48 54 85 86 148 149 154 185 186 187 189 248 254 349 (not for Landeron 51)

Neuf de stock / New old stock never used