Jaeger Lecoultre 838 839 / IWC 1852 setting wheel / part 450

Jaeger Lecoultre 838 839 setting wheel

This is not the additional setting wheel, part 453, which is larger

Also for IWC 1852

Part 450

Renvoi (c'est le renvoi, ce n'est pas le renvoi intermédiaire qui est plus grand)

Pre-owned / pre-used, dismounted from JLC 839