| 1260961 | OC20 | Germanium P-N-P high power transistor | Mullard |
| 1260962 | OC20 | Germanium Transistor | Mullard |
| 1260963 | OC20 | PNP Germanium AF Alloy Transistor in TO3 metal case | Newmarket Transistors NKT |
| 1260964 | OC200 | Silicon p-n-p low power transistor | Mullard |
| 1260965 | OC200 | Silicon Transistor | Mullard |
| 1260966 | OC201 | Silicon p-n-p low power transistor | Mullard |
| 1260967 | OC201 | Silicon Transistor | Mullard |
| 1260968 | OC202 | Silicon p-n-p low power transistor | Mullard |
| 1260969 | OC202 | Silicon Transistor | Mullard |
| 1260970 | OC203 | Silicon p-n-p low power transistor | Mullard |
| 1260971 | OC203 | Silicon Transistor | Mullard |
| 1260972 | OC204 | Silicon p-n-p medium power transistor | Mullard |
| 1260973 | OC204 | Silicon Transistor | Mullard |
| 1260974 | OC205 | Silicon p-n-p medium power transistor | Mullard |
| 1260975 | OC205 | Silicon Transistor | Mullard |
| 1260976 | OC206 | Silicon p-n-p medium power transistor | Mullard |
| 1260977 | OC206 | Silicon Transistor | Mullard |
| 1260978 | OC207 | Silicon p-n-p medium power transistor | Mullard |
| 1260979 | OC207 | Silicon Transistor | Mullard |
|
| 1260980 | OC22 | Germanium Transistor | Mullard |
| 1260981 | OC22 | Germanium PNP RF power transistor | VALVO |
| 1260982 | OC23 | Germanium Transistor | Mullard |
| 1260983 | OC23 | Germanium PNP RF power transistor | VALVO |
| 1260984 | OC24 | Germanium Transistor | Mullard |
| 1260985 | OC24 | Germanium PNP RF power transistor | VALVO |
| 1260986 | OC25 | Germanium P-N-P high power transistor | Mullard |
| 1260987 | OC25 | Germanium Transistor | Mullard |
| 1260988 | OC25 | PNP Germanium AF Alloy Transistor in TO3 metal case | Newmarket Transistors NKT |
| 1260989 | OC250 | Opto coupler | Voltage Multipliers |
| 1260990 | OC26 | Germanium PNP power transistor | TUNGSRAM |
| 1260991 | OC26 | Germanium PNP power transistor | VALVO |
| 1260992 | OC260 | Oven Controlled Crystal Oscillators (OCXOs) | ANALOGIC TECH |
| 1260993 | OC28 | Germanium NPN Low Power Transistors | Diode Transistor Co Inc |
| 1260994 | OC28 | Germanium Power Transistors | GPD Optoelectronic Devices |
| 1260995 | OC28 | Germanium P-N-P high power transistor | Mullard |
| 1260996 | OC28 | PNP Germanium AF Alloy Transistor in TO3 metal case | Newmarket Transistors NKT |
| 1260997 | OC28 | Germanium PNP switching power transistor | VALVO |
| 1260998 | OC29 | Germanium P-N-P high power transistor | Mullard |
| 1260999 | OC29 | PNP Germanium AF Alloy Transistor in TO3 metal case | Newmarket Transistors NKT |
| 1261000 | OC29 | Germanium PNP switching power transistor | VALVO |
