I have a 10.5" stainless Super Blackhawk with the box, model number KS-410N.  The current gun in this variety is a KS 411N.  The 411N has a bull barrel.  The 410N has a normal tapered barrel like a 7.5 incher.  I know that they only made this variation for a few years but if anyone could tell me the exact years and how many were made, I would really appreciate it.  Is this gun worth more to a collector or is it the same value as the current models?  It might be for sale.
Thanks in advance.
Doc T