Ted, black chrome is indeed the finish on the barrels of most SKB's imported by Ithaca. Later on, they switched to conventional blue because they ran afoul of the Japanese equivalent of the EPA, as I understand it. Toxic waste from the black chrome process. You will see some Ithaca SKB barrels that have faded. But for the most part, considering the age of the guns in question (many over 40 years), the finish seems to hold up pretty well.
Ironman, they never came with double triggers, except for the "Royal" model, which is seldom seen in this country. None of the Ithaca imports had double triggers. The choke tubes must've been added. I don't believe any sxs had choke tubes at the time Ithaca was importing the SKB's. The late 80's guns and the more recent imports (385/485) which came in under the SKB name did have choke tubes, but they're the only ones with SKB factory screw-ins.
