SF-VI
I believe you are talking about the Colt SF-VI snubby. The "S" stands for stainless, "F" is frame and "VI is the Roman numeral for six, refering to the number of 38 cal rounds it can hold in the cylinder. It was made for a few years, and replace with the "Magnum Carry" which is the 357 cal model. I have the Magnum Carry. You will notice the trigger is very sharp and after numerous rounds, it begins to hurt. I had to remove the trigger and file down the sharp edges. I don't believe it is up to the workmanship of the older Colt Detective Specials (in my opinion)The lockwork of the old detective special was hand fitted and was costing Colt to much to make, making them less competative in the market. The lockwork of the DS was similiar to the Python. However the SF-VI retains the famous "second hand" and the leaf spring for the main spring. It has a frame mounted firing pin, very different from S&W I might add. I think the snubby feels awfully well balanced. It's barrel crown is recessed, to protect againt damage. mine seems to be very accurate.
I quess you can tell, I have a thing for Colt revolvers.
I hope this helps you out some.