I guess the question is what is the serial # on the rifle.
That dates it to a production run/yr.
Disregard my Post 50 as that info is mentioned in the article.
“However a unique serial number that Winchester stamped on all their rifles enable researchers
to cross reference with records at the Buffalo Bill Center of the West Museum in Cody, Wyoming,
to establish the weapon had been manufactured and shipped in 1882. “