The venerable 1N34A Germanium Signal Diode. I eventually learned about “real” diodes and the 1N34A Germanium diode was my “goto” diode into my teens. Nowadays looking into a modern version ...

With nothing more complex than a germanium point-contact diode and an oscilloscope ... who brought us its archetype, the 1N34A.

The limited edition black version, meanwhile, features the same complement of controls, but also features some rare NOS ...