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The crimped metal ends do nit have any numbers.
The high pressure hose do not have a date code on the metal crimped ends judt the markings on the rubber hose . But the lower high pressure has the correct date code on the crimped end same on the valve to pump hose.
Thanks for your help. I am looking for a nos C7ZZ-3A713-B Return hose. My used one has a crack on the hose. I have NOS High pressure and NOS lower high pressure hoses.