The Nazis did Not use Bar Codes.
In Poland the city of Lodz was used by the
Germans as the Rail Terminal to take Jewish
prisoners to the camps.
There are pages and pages of the names and
dates of those transported to the camps in cattle trucks.
It was extremely well organised and well
documented in detail at the time. There are no bar codes on the documentation.
If you are in doubt, you should VISIT the station at Lodz.