OE correct dimpled electronic voltage regulator 1970-early72

ir3333 said
in your example are they 21st week 1970 and 43 week 1969?
would both be correct for 1970 models?

Yes both are correct but I supply more date codes that can get you closer to your SPD. Also, the two different case styles for before 01/1970 and the later for after. Hope this helps.