Jaeger-Lecoultre mainspring 460 9OL 9OLN

Ressort de barillet / Zugfeder / Mainspring 

New old stock / neuf de stock

Inox premium quality

Same mainspring for all following calibers :

Jeager-Lecoultre 460 (model with double brace only) ,  9-OL , 9-OLN
Bride à ailettes / Double brace