I just found a Blued Steel Chief's Special in As New condition and bought it. It's a sweet gun. I've had it out to the range and it runs like one of the modern Performance center guns. The bluing is so pristine it looks black in most light.
The form and fit on this gun is way better than what I find on my modern 638-3. For instance, the Forcing Cone to Cylinder gap is @ 60% tighter than on my 638. Exceptional workmanship.
It was in the original Blue Box with all the Documentation and an unopened brass cleaning brush with rod and , it looked like it had never been fired.
The Instruction sheet called it a model 36, the dates on the sheet were 1969 and 1970. The instructions said this gun was rated for .38 Special rounds and something called .38 Medium rounds.
Do you, or anyone on this forum, know what a .38 Medium round is/was?