Jaeger Lecoultre 889 889/2 900 928/2 motion work setting wheel / part 31102

Jaeger Lecoultre 900 renvoi de roue de minuterie (ce n'est pas le renvoi)

Motion work setting wheel (this is not the setting wheel)

Part 1.31102.900 , same part for JLC 900 889 889/2 928/2

Also ok for Audemars Piguet 2124 , Vacheron Constantin 1126 , IWC 3254

Pre-owned / pre-used, dismounted from JLC 900