2 Vintage Heintz & Kaufman 6687/E91H Logic Switching Heptode Tube - BangyBang Tubes

$35.00

Brand	Heintz & Kaufman
Model	6687
Type	Heptode
Use	Logic Switching Tube
Similar/Equiv	E91H
Condition	New in Box (NOS)
Tubes per listing	2

66XXX