Well, since I posted this request I've discovered that information on the semi-automatic Chiefs Special line is darn scarce. However, after a lot of digging, I did find some facts from several different sources.
For those who may be interested, here's what I've found so far.
CS40 Chiefs Special specifications:
Barrel length: 3 1/4"
Overall length: 6 1/2"
Height: 4 5/8"
Width: 1 3/8"
Weight: 24.2 oz
I had a pretty good idea that my CS40 with serial # EKY7225 was an early one and Smith & Wesson confirmed this. It shipped from the factory on 2-16-1999. With 1999 being the first year of production for the CS40, this makes mine a very early example.
