I have a newer bear takedown "a" riser that I plan to hunt with this year, but have recently purchased a green stripe "b" riser with red tip limbs. I am also very interested in info about the "c" riser. Any info is welcome, including pointing me to another thread as I am new to this forum.
Why not invest a few $ in Jorge Coppen's book:
Bear Archery
Traditional Bows
A Chronological History
1949 - 2015
(https://i.gr-assets.com/images/S/compressed.photo.goodreads.com/books/1454871516l/28955409._SY475_.jpg)
Have a copy on the way now!
Here is a fun thread for you to entertain yourself for a few hours.
https://www.tradgang.com/tgsmf/index.php?topic=51759.0