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The purpose is just to keep track of production. If something does not meet QC specs, they can identify when and what die the problem occurred, then go and fix it and then inspect the ones that were made after that more closely. It also is nice to know when the part was made, just like it is nice to know when your car was made, even if an 83 is basically the same as a 78 or an 85. Fatigue cracking, for one, though this only seen in highly stressed engines.
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1971 911S, 2.7RS spec MFI engine, suspension mods, lightened
Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance
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