My bud still has his, and uses it every time he goes out during our state s shotgun-only deer season. They were made in all the usual configs and in the early 70 s, a friend and myself got our paws on 12ga Ithaca Deerslayer / slug gun versions, w/rifle sights. The XL models were gas guns - a LOT better than the non-XL recoil-operated guns. The XL900 s had the silversided alloy receiver w/game scene, while the samo-X元00 s had a plain blue-colored alloy receiver. One of those relationships was the Ithaca Gun Co, of Ithaca, NY.
You have an SKB shotgun - but no one else ever manufactured them, except SKB Tokyo, Japan, who DID rebrand them at various times for their US importers.