You were very likely looking at a Chiefs Special Target (although mine was a square butt)---a series that came into being at the behest of Herbie Harris---he of H.H. Harris Co. (Chicago S&W distributor, also known as The Handgun Headquarters of The United States)----so named by Himself, who had a decided fondness for weird guns---this being one of the more weird----never mind you could shoot competitive scores at 25 and 50 yards with them---if you paid (very close) attention to what you were doing. You could also win fairly substantial sums of money from those who bet you couldn't do it---------that being the motivating factor.
Actually, the real motivating factor wasn't so much winning the money---as losing it! Oh the shame of it all!!
Been there---done that!
Ralph Tremaine
And by the way, a set of J frame target grips helped---immensely!