OA-79, germanium contact point high-frequency diode, early… | Flickr
1 PC OA85 Germanium diode 115V 50mA. Black glass encapsuled Ø4.4x12 MM *Used* - £1.97 | PicClick UK
Microscopy of the interior of a 1970's type germanium diode type OA85 in glass body. Left is anode, right is catode. The semiconductor cell is on the cathode. Stock Photo | Adobe