12J5GT VT135 National Union, triple mica, black plate, NOS/NIB, single piece

Description

One National Unionl 12J5GT  VT 135 tubes.

This is the military VT135 special quality version made for the  US forces in the 1940ies.

These tubes feature a triple mica construction and extra long black plates. We have actually never seen any thing like this in a 12J5GT or 6J5GT.

This particular tube may have seen  minor use but still tests 100%+ in terms of emission and gm.

Tested and guaranteed!