2N2957 semiconductor manufactured by Sylvania, listed as 2N2957 (circa 1979).

2N2956 semiconductor manufactured by Sylvania, listed as 2N2956 (circa 1979).

2N2955 semiconductor manufactured by Sylvania, listed as 2N2955 (circa 1979).

2N2953 semiconductor manufactured by Sylvania, listed as 2N2953 (circa 1979).

2N2952 semiconductor manufactured by Sylvania, listed as 2N2952 (circa 1979).

2N2951 semiconductor manufactured by Sylvania, listed as 2N2951 (circa 1979).

2N2949 semiconductor manufactured by Sylvania, listed as 2N2949 (circa 1979).

2N2946A semiconductor manufactured by Sylvania, listed as 2N2946A (circa 1979).

2N2946 semiconductor manufactured by Sylvania, listed as 2N2946 (circa 1979).

2N2945A semiconductor manufactured by Sylvania, listed as 2N2945A (circa 1979).

2N2945 semiconductor manufactured by Sylvania, listed as 2N2945 (circa 1979).

2N2944A semiconductor manufactured by Sylvania, listed as 2N2944A (circa 1979).

2N2944 semiconductor manufactured by Sylvania, listed as 2N2944 (circa 1979).

2N2943 semiconductor manufactured by Sylvania, listed as 2N2943 (circa 1979).

2N2942 semiconductor manufactured by Sylvania, listed as 2N2942 (circa 1979).

2N2938 semiconductor manufactured by Sylvania, listed as 2N2938 (circa 1979).

2N2935 semiconductor manufactured by Sylvania, listed as 2N2935 (circa 1979).

2N2934 semiconductor manufactured by Sylvania, listed as 2N2934 (circa 1979).

2N2933 semiconductor manufactured by Sylvania, listed as 2N2933 (circa 1979).

2N2932 semiconductor manufactured by Sylvania, listed as 2N2932 (circa 1979).