RARE NOS tubes 6922 - E88CC - ECC88 Penta Laboratories USA
Yellow lettering on glass :
6922 Penta Laboratories
Chatsworth CA USA
9730
Double large support getter
Disc getter
Pinched base
Tubes in perfect original condition
Open only for test and pictures
Never used before
Tested on Amplitrex with really strong values
Shipping by registered post : $30