1N3031A semiconductor manufactured by United Technical Publications, listed as 1N3031A (circa 1965).

1N2989 semiconductor manufactured by United Technical Publications, listed as 1N2989 (circa 1965).

1N3031 semiconductor manufactured by United Technical Publications, listed as 1N3031 (circa 1965).

1N2988B semiconductor manufactured by United Technical Publications, listed as 1N2988B (circa 1965).

1N3030B semiconductor manufactured by United Technical Publications, listed as 1N3030B (circa 1965).

1N2988A semiconductor manufactured by United Technical Publications, listed as 1N2988A (circa 1965).

1N3030A semiconductor manufactured by United Technical Publications, listed as 1N3030A (circa 1965).

1N2988 semiconductor manufactured by United Technical Publications, listed as 1N2988 (circa 1965).

1N3030 semiconductor manufactured by United Technical Publications, listed as 1N3030 (circa 1965).

1N2986B semiconductor manufactured by United Technical Publications, listed as 1N2986B (circa 1965).

1N3029B semiconductor manufactured by United Technical Publications, listed as 1N3029B (circa 1965).

1N2986A semiconductor manufactured by United Technical Publications, listed as 1N2986A (circa 1965).

1N3029A semiconductor manufactured by United Technical Publications, listed as 1N3029A (circa 1965).

1N2986 semiconductor manufactured by United Technical Publications, listed as 1N2986 (circa 1965).

1N3029 semiconductor manufactured by United Technical Publications, listed as 1N3029 (circa 1965).

1N2985B semiconductor manufactured by United Technical Publications, listed as 1N2985B (circa 1965).

1N3028B semiconductor manufactured by United Technical Publications, listed as 1N3028B (circa 1965).

1N2985A semiconductor manufactured by United Technical Publications, listed as 1N2985A (circa 1965).

1N3028A semiconductor manufactured by United Technical Publications, listed as 1N3028A (circa 1965).

1N2985 semiconductor manufactured by United Technical Publications, listed as 1N2985 (circa 1965).