Thanks for your comments!
I've learned a little bit I can share, and maybe it will jog some memories for others.
Bob sold to Head around 1968, and they sold to AMF in 1970. Mr. Lee was on a 5 year contract to stay on as part of sale to Head.
My 1977 Archers Digest doesn't mention the White Wing, so I'm assuming that it was a discontinued model.
This is a great shooter, Wife and I both shot it over the weekend. Quiet and smooth! Just a little too long and light for me.
So my quest continues to find any more info on the "White Wing" model and if I can date it any more exactly than a three year time frame.