DET16 Marconi Valves Tubes x 2 Used

One appears to be brand new and one has slight discolouration on the sticker so may have been used for test purposes

Unable to test but filaments are intact and getters are very strong

Large carbon anode

Marconi stickers

Same date codes: 12th December 1963

Used

As per photos

Same date codes: 12th December 1963