McVitie Weston valve collection, Osram Mercury Vapour Lamp valve
- maker:
- Osram
Osram Mercury Vapour Lamp valve, hour-glass shaped tube with side anode, end cathode cap missing, (RMW/K10 - McVitie Weston number), by Osram.
Osram Mercury Vapour Lamp valve, hour-glass shaped tube with side anode, end cathode cap missing, (RMW/K10 - McVitie Weston number), by Osram.