trim tag build date

[70Z28RS5151]

Were there 4 or 5 weeks of assembly in October 1968? Did GM go to a 10E week?

[Mr70]

Which car & plant cause sometimes it mattered.
There were 5 weeks in that month regardless,even if a plant had an off week or not but playing the devils advocate,theoreticly that coulda been a week when they didn't assemble.

OCTOBER 1968
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[70Z28RS5151]

This inquiry is with respect to a 1969 Camaro.