So true! I learned something right now for sure. Had not noticed the bushings were an option in 1970. I can see it in the catalogue now.
In addition to the bushing I thought the grip was reshaped from type-I to II. Leveling out the ridge below ones hand. Also learned from listening to Bowdoc and/or Alaskabowhunter, that all this was done from #1700 onwards.
I really don't know - but wonder once in a while when I see a riser described different. Had an other person say just the same few weeks ago, with a serial in the A-18xx.
Is there a "definition" by Bear to it or are there just "two schools" out there?