Image Item No. Description  745-1 (Inv)  Baseplate, Green 1 Part, 1978 Catalog: Sets: Universal Building Set: Supplemental  813-1 (Inv)  Baseplate, Green 1 Part, 1986 Catalog: Sets: Universal Building Set: Supplemental  819-1 (Inv)  Blue Sea Plate 1 Part, 1991 Catalog: Sets: Universal Building Set: Supplemental  821-1 (Inv)  Brick Separator, Gray 1 Part, 1990 Catalog: Sets: Universal Building Set: Supplemental  840-1 (Inv)  Baseplate, Green 1 Part, 1980 Catalog: Sets: Universal Building Set: Supplemental  1651-1 (Inv)  Basic Building Set Trial Size 30 Parts, 1993 Catalog: Sets: Universal Building Set: Basic