The Mark 5 was introduced in 1962 in a variety of Winchester and Western paper shells. "Mark 5" was a polyethylene collor around the shot.
Winchester and Western pastic shells were introduced in 1964. I showed the page for the compression formed shells above, but they also introduced Poly-Formed cases which were a plastic tube with the fiber base wads for the Winchester Ranger and the Western Xpert shells --
It appears these are what are in your AA box. Olin continued to offer the Ranger and Xpert Mark 5 shells in paper and poly-formed cases thru the end of the 1960s, but the paper offerings were becoming less. In 1971 the Ranger and Xpert were gone, replaced by the compression formed Upland shell in both Winchester and Western brand. IMHO the compression formed Upland was one of the nicest upland shells ever offered. I shot a load of them in 16-gauge for Doves during the years I lived in Virginia. I'm still loading the hulls.
Hybrid Mode