Here's what I found on the web about Carter tags
The basic model number - that would establish the parts list - I still don't know if one of the leaner metering robs is locally installed how that is indicated . . . perhaps it never was.
Revision status is the first digit below the model number - I know a lot of models have an 'A' revision
Second digit is a date of manufacture code.
The holes indicate 'in process' inspection steps - I suspect if the carburetor doesn't pass inspection one it doesn't get a stamp until something is done to correct the malfunction.
See photo.
dp
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