The SKB doubles and over-unders first appear in the 1966 Ithaca Gun Co. catalogue. The side-by-sides offered were the 100 Field, 200E Deluxe Field and the 200E Skeet, in 12-gauge only with barrel lengths of 30-inch full and modified, 28-inch modified and improved cylinder or full and modified, and 26-inch modified and improved cylinder. The 200E Skeet could be had with 26- or 28-inch barrels bored skeet and skeet.
For 1967, the 20-gauges were added to the line with barrel lengths of 28-inch full and modified or 25-inch modified and improved cylinder. For the 20-gauge 200E Skeet the barrel length was 25-inch bored skeet and skeet. Also the 28-inch option was gone from the 12-gauge 200E Skeet. Offerings remained the same through the 1970 Ithaca catalogue.
In 1971 the straight gripped 280 was added to the line. It came in 12-gauge with 28-inch full and modified or 26-inch modified and improved cylinder barrels and 20-gauge with 28-inch full and modified or 25-inch modified and improved cylinder barrels. For 1973 the option of 20-gauge 25-inch barrels both bored improved cylinder was added to the 280 and the 20-gauge 200E Skeet barrels grew to 26-inch. Offerings remained the same through the 1977 Ithaca Gun Co. catalogue. I don't have any Ithaca paper dated 1978, and by the 1979 Ithaca catalogue the SKBs are gone.
The 1979 SKB Sports, Inc. catalogue adds the 480, but the barrel lengths remain 28- and 26-inch in 12-gauge and 28-inch and 25-inch in 20-gauge for both the 280 and 480.
