PM received - but I'll share. ;-)
5/8" tips help helps age it a bit; as does whether they are smoothed or "blocky" and less shaped.
Here are three Red Wing Hunters - most recent (a Head version) on the left is post 1968. In the middle is a Wing with the silkscreened labels: 1966 to 1968 perhaps? On the right is older still. I suspect 1964 to 1966, but it may be older.
Wing was making 1500 bows a week, but the serial numbers are four digit. I suspect they went 1000 to 9999 and then back to 1000 to start over.
AMF/Head is more recent (I don't own one of those).
The early bow weighs about 30% less than the later two. It also is a bit "sensitive" and critical of form, like a Ferrari or Maserati, and the first one I had the tips snapped off when I had an arrow nock break and the bow dry-fired. I love it and treasure it, but I can see why Bob Lee widened the tips.