Summary
Triode manufactured by Marconi Osram Valve Company in England. Up to 1925, all radio parts had to be licensed by the Postmaster General's Department with a BBC logo stamped on the item.
Physical Description
Spherical bulb with top exhaust tip and 4 pin European style base with metal shell.
More Information
-
Collecting Areas
-
Manufacturer
-
Inscriptions
On bulb: " MARCONI VALVE / MADE AT THE OSRAM LAMP WORKS / COVERED BY VARIOUS PATENTS ", " R ", " 88 ", " BBC ", " TYPE APPROVED BY POST MASTER GENERAL " On base: " G ", " A ", " MOV / Co LTD "
-
Classification
-
Category
-
Discipline
-
Type of item
-
Overall Dimensions
120 mm (Height), 50 mm (Outside Diameter)
-
Keywords