Mullard CV7130 OA91 Germanium Signal Diode DO-7 Case 1 2 5 10 25 Pieces MBL1-05 | Rich Electronics
10pcs OA91A ORIGINAL Germanium Diode, Point Contact Type, OA91, 0A91 560 NEW | eBay
Peak Electronic Design Ltd 💙🇪🇺 on Twitter: "@KangaSales The OA91 is actually my favourite germanium diode (built my very first crystal set with one). I must have one somewhere here at Peaky
OA91 GERMANIUM DIODE (2021) on eBid Ireland | 197802353