Common Applications: Vintage and classic import vehicles (including Fiat 600, 770, 850, and 1100 models), early Triumphs, and various agricultural/industrial equipment. Equivalent / Interchange Part Numbers: Can sometimes cross-reference with National 1077 or Raybestos 550186.Sourcing: Since it is often classified as a New Old Stock (NOS) item or an obsolete factory part, availability relies heavily on specialized parts dealers and liquidation sites.