Jaeger Lecoultre 839 / IWC 1852 complete balance / part 721 (good condition)

Jaeger Lecoultre 839 complete balance , good condition

Also for IWC 1852

Part 721

Balancier complet pour Jaeger LeCoultre 839, très bon état

Pre-owned / pre-used, dismounted from JLC 839 in good working condition