So it would appear that my best approach to this question
is to find pictures that show the lube/repack data markings.
Is there a web site (s?) that focuses on that aspect?
It would help me if that site was organized by era and by
location and/or that it had pictures that are easily
identified in terms of the date and location that the
lube/repack info was done. And, as long as I'm stating
my preferences ... it should include examples of West