The earliest ads I've found for Jet Wings are in some publications dated 1954 (the year before Plumb started using Permabond in axes), describing Jet Wings as being "new".
Farm Journal - Volume 78 - Page 72
https://books.google.com/books?id=cSZHAAAAYAAJ
1954 - ‎Snippet view
The
new axe that's PLUMB BEAUTIFUL Jet Wing Axes...
Country Gentleman - Volume 124 - Page 70
https://books.google.com/books?id=7hMgAQAAMAAJ
1954 - ‎Snippet view
...are combined in these
new Jet Wing Axes ...
Here's a photo of the ad the 300Six mentioned that's supposedly from 1954 (with no mention of Permabond):
The latest mention I've found of Jet Wing being a Plumb brand was in this
1973 publication:
Standard Directory of Advertisers - Part 1 - Page 33
https://books.google.com/books?id=8toUAQAAMAAJ
1973 - ‎Snippet view
... JET WING Axe Fayette R. Plumb, Inc ...