Get your brakes working properly.  This is a NOS Girling brake master cylinder L4212-120.  .812'' diameter.  So a 1976-1980 Renault R5 / Le Car.  The box has seen much better decades, but the brake master cylinder is in great shape and ready to go.  You cannot beat the original old parts.  Get this for now or down the road.  Overseas shipping no problem.

Shipping is gladly combined on multiple purchases to keep shipping costs as low as possible