Ted, if the Model 400 has factory tubes and isn't marked either Ithaca or Mitsui, then it's a gun from the late 80's. For a fairly brief period of time, SKB brought in some sxs back then. Fairly similar to the old Ithaca imports, but with a higher gloss finish to the wood, blued barrels rather than black chrome, and choke tubes. The side-plated 400 was the more expensive gun. There was also a 200E, scalloped boxlock with game scenes and coin finish. Straight grip gun, which was confusing because the Ithaca-imported 200E's were PG guns. (The E was for ejector on the Ithaca guns; stood for English on the later ones.) I bought a couple of the 200E's in 20ga, brand new, backi in the late 80's. Good guns, although I still prefer the old Ithaca imports.