"magic eye" tuning indicator
Datecirca 1934
Inventory NumberVT5213
ClassificationVacuum Tube
Subject
Maker
Valvo
1924 - 1929
Cultural Region
Place of Origin
Dimensions8.6 × 2.5 cm (3 3/8 × 1 in.)
Material
DescriptionTriode,Cylindrical
FunctionTuning indication
