In the middle 70's our department switched to Model 39 + 59's. I sold the Model 27 I previously carried.(What an idiot). The 27 had factory target hammer, trigger, and grips. 6" ventilated rib barrel. I have never seen another with that barrel. Is it possible that my memory is flawed on that feature. Was the 27 supplied from S&W with a ventilated rib barrel?

Thanks for the help.