McVitie Weston valve collection, Osram valve, type PT6
- maker:
- Osram
Osram valve, type PT6, special 4-pin base and top anode cap, (RMW/J157 - McVitie Weston number), by Osram.
Osram valve, type PT6, special 4-pin base and top anode cap, (RMW/J157 - McVitie Weston number), by Osram.