Camillus American Wildlife Series Set Year Identification

[luckysunuvagun]

Hello, all. I recently discovered that my grandfather had purchased the linked set of Camillus knives for infant me, but it was lost in storage until now. I have poured through the catalogs available on the collector page and cannot pin down the year of production. Would anyone happen to know by the layout and style what year these are?

https://imgur.com/a/QT7Iotf