Don't know if mine is an "early one" or not, but it is definitely blued. I have another shotgun that is black chromed, and the finishes look nothing alike. Should be easy for you to tell which it is.
Blued Ithaca SKB 200E
SRH
Ithaca-SKB black chrome finish is entirely different from the black chrome finishes you see on the fairly modern Turkish and cheaper Italian offerings. The Ithaca-SKB finish is very velvety with a very attractive sheen.
Ive owned 4 Ithaca SKB 100s and 1 200E. All of them were black chromed.