I know what you mean;
Standard Catalogue of Firearms....400E engraved false sideplatesand an English style stock. Imported prior to 1990
1996 Blue Book 400 boxlock, sst, ae, moderately engraved coin finish receiver with sideplates.
Later 400 similar to original Model 400, sst, ejectors, recoil pad Imported 1987-88 (doesn't mention sideplates.
400E similar to new Model 400, except has engraved sideplates and straight grip stock Imp. disc. 1989
Maybe this is yours: Guntrader's Guide...Model 400 skeet Similar to Model 200E skeet except higher grade with more elaborate engraving and full fancy wood.
