1N2999A semiconductor manufactured by United Technical Publications, listed as 1N2999A (circa 1965).

1N3038A semiconductor manufactured by United Technical Publications, listed as 1N3038A (circa 1965).

1N2999 semiconductor manufactured by United Technical Publications, listed as 1N2999 (circa 1965).

1N3038 semiconductor manufactured by United Technical Publications, listed as 1N3038 (circa 1965).

1N2997B semiconductor manufactured by United Technical Publications, listed as 1N2997B (circa 1965).

1N3037B semiconductor manufactured by United Technical Publications, listed as 1N3037B (circa 1965).

1N2997A semiconductor manufactured by United Technical Publications, listed as 1N2997A (circa 1965).

1N3037A semiconductor manufactured by United Technical Publications, listed as 1N3037A (circa 1965).

1N2997 semiconductor manufactured by United Technical Publications, listed as 1N2997 (circa 1965).

1N3037 semiconductor manufactured by United Technical Publications, listed as 1N3037 (circa 1965).

1N2995B semiconductor manufactured by United Technical Publications, listed as 1N2995B (circa 1965).

1N3036B semiconductor manufactured by United Technical Publications, listed as 1N3036B (circa 1965).

1N2995A semiconductor manufactured by United Technical Publications, listed as 1N2995A (circa 1965).

1N3036A semiconductor manufactured by United Technical Publications, listed as 1N3036A (circa 1965).

1N3036 semiconductor manufactured by United Technical Publications, listed as 1N3036 (circa 1965).

1N2993B semiconductor manufactured by United Technical Publications, listed as 1N2993B (circa 1965).

1N3035B semiconductor manufactured by United Technical Publications, listed as 1N3035B (circa 1965).

1N2993A semiconductor manufactured by United Technical Publications, listed as 1N2993A (circa 1965).

1N3035A semiconductor manufactured by United Technical Publications, listed as 1N3035A (circa 1965).

1N2993 semiconductor manufactured by United Technical Publications, listed as 1N2993 (circa 1965).