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Brand: National Union
Type: Vacuum Tube
Model: 307A VT-225
Country/Region of Manufacture: United StatesAuction is for one platinum matched pair (2 tubes) 307A National Union VT-225 NOS NIB JAN CNU307A.
True triple mica construction, brown base.
Direct plugin replacement for Western Electric 307A and very close to Western Electric 306A, just without center filament tap.
The best sounding 307A after WE.
Registered airmail shipping.