The folks at mearsonline have a year by year breakdown of the Packers manufacturers which is quite comprehensive, pointing out that according to their information Wilson jerseys were last used around 1959-60. Shout out to them.

I sent an inquiry to Historic Auctions about their John Jefferson Packers game used jersey which according to the photos was made by wilson

I asked what information their authenticator used.

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http://www.historicauctions.com/sear...ctionid/33841/

***FOOTNOTE TO THIS- I WAS ALERTED THAT THE WILSON PHOTO DOESN'T MATCH THE TAG IN THE SECONDPHOTO ABOVE- IT LOOKS LIKE THERE'S A SAND KNIT TAG IN THE SECOND PHOTO AND THEY HAVE PUT IN THE WRONG CLOSE UP SHOT. SEEMS LIKE THE JEFFERSON IS ACTUALLY A SAND KNIT JERSEY***

Thanks also to the other people who emailed me answers to my question.
Eric