2N625 semiconductor manufactured by Sylvania, listed as 2N625 (circa 1979).

2N1309A semiconductor manufactured by Sylvania, listed as 2N1309A (circa 1979).

2N1189 semiconductor manufactured by Sylvania, listed as 2N1189 (circa 1979).

2N1100 semiconductor manufactured by Sylvania, listed as 2N1100 (circa 1979).

2N974 semiconductor manufactured by Sylvania, listed as 2N974 (circa 1979).

2N819 semiconductor manufactured by Sylvania, listed as 2N819 (circa 1979).

2N708 semiconductor manufactured by Sylvania, listed as 2N708 (circa 1979).

2N624 semiconductor manufactured by Sylvania, listed as 2N624 (circa 1979).

2N1309 semiconductor manufactured by Sylvania, listed as 2N1309 (circa 1979).

2N1188 semiconductor manufactured by Sylvania, listed as 2N1188 (circa 1979).

2N1099 semiconductor manufactured by Sylvania, listed as 2N1099 (circa 1979).

2N973 semiconductor manufactured by Sylvania, listed as 2N973 (circa 1979).

2N818 semiconductor manufactured by Sylvania, listed as 2N818 (circa 1979).

2N707A semiconductor manufactured by Sylvania, listed as 2N707A (circa 1979).

2N623 semiconductor manufactured by Sylvania, listed as 2N623 (circa 1979).

2N1308 semiconductor manufactured by Sylvania, listed as 2N1308 (circa 1979).

2N1187 semiconductor manufactured by Sylvania, listed as 2N1187 (circa 1979).

2N1098 semiconductor manufactured by Sylvania, listed as 2N1098 (circa 1979).

2N972 semiconductor manufactured by Sylvania, listed as 2N972 (circa 1979).

2N817 semiconductor manufactured by Sylvania, listed as 2N817 (circa 1979).