Original Molsheim Locking Petrol Cap.This is the only one I have ever seen.The outer cap fits over, and locks into, the inner cap thus securing the petrol tank.
Beautiful bronze cast combined petrol on-off tap, petrol filter and petrol drain. Designed to screw directly into gravity feed petrol tank.Very well designed and quality made with brass gauze internal. In excellent condition. I believe it to be NOS.VERY RARE to find one as good as this.Will post world wide.