2020-09-03 18:34:59 UTC
two page color ad by GM showing their research lab on engines.
Presumably they had some mechanized method to process all the
data collected during trials. The C-P-C was popular in those
days. Bitsavers has books on that.
Also, two page color ad on Buick's "greatness".
Packard was once a premium auto make. Two page color ad.