1N6027B semiconductor manufactured by Sylvania, listed as 1N6027B (circa 1979).

1N6026B semiconductor manufactured by Sylvania, listed as 1N6026B (circa 1979).

1N6025B semiconductor manufactured by Sylvania, listed as 1N6025B (circa 1979).

1N6024B semiconductor manufactured by Sylvania, listed as 1N6024B (circa 1979).

1N6023B semiconductor manufactured by Sylvania, listed as 1N6023B (circa 1979).

1N6022B semiconductor manufactured by Sylvania, listed as 1N6022B (circa 1979).

1N6021B semiconductor manufactured by Sylvania, listed as 1N6021B (circa 1979).

1N6020B semiconductor manufactured by Sylvania, listed as 1N6020B (circa 1979).

1N6019B semiconductor manufactured by Sylvania, listed as 1N6019B (circa 1979).

1N6018B semiconductor manufactured by Sylvania, listed as 1N6018B (circa 1979).

1N6017B semiconductor manufactured by Sylvania, listed as 1N6017B (circa 1979).

1N6016B semiconductor manufactured by Sylvania, listed as 1N6016B (circa 1979).

1N6015B semiconductor manufactured by Sylvania, listed as 1N6015B (circa 1979).

1N6014B semiconductor manufactured by Sylvania, listed as 1N6014B (circa 1979).

1N6013B semiconductor manufactured by Sylvania, listed as 1N6013B (circa 1979).

1N6012B semiconductor manufactured by Sylvania, listed as 1N6012B (circa 1979).

1N6010B semiconductor manufactured by Sylvania, listed as 1N6010B (circa 1979).

1N6009B semiconductor manufactured by Sylvania, listed as 1N6009B (circa 1979).

1N6008B semiconductor manufactured by Sylvania, listed as 1N6008B (circa 1979).

1N6007B semiconductor manufactured by Sylvania, listed as 1N6007B (circa 1979).