The final tally? Drumroll please... 3,729 of the KBN-3275 were produced! I would have never guessed that!! And during most of the time that it was produced, the KBN-3275 represented about 1/3 of Ruger's total 38- prefix output at the time!!!
How many pinto guns with stainless barreled frame and blue cylinder, Model 0356? There were 71.
And then I also ran into serial number 38-14533 which comes up as Ruger model 0357 in .327 Fed. I believe it to be a blue gun because there are 40-50 other blue .357 models before that serial number and after that serial number. I asked the pertinent people at the factory what configuration the 0357 was and they went quiet. I believe it to be the only blue Blackhawk made in .327 Fed. although I am unable to confirm. I believe it also has a 5-1/2" barrel like its stainless counterpart.
So through my research, it appears the cleanup occurred between 38-23963 and 38-24041 because that is where you will find the 71 "pinto" guns as well as the last 5 stainless KBN-3275's model 0353. With that, I believe the 71 blue cylinder "pinto" guns (model 0356) are the "leftovers" from when the blue .327 Blackhawk (38-14533) was considered.
Chet15