Vintage CBS Hytron 12BZ7 vacuum tube in its original red, blue and tan CBS Hytron "Electron Tube – For New-Set Performance" box (Hytron Radio & Electronics Co., a division of Columbia Broadcasting System). The glass is printed CBS Hytron, Made in U.S.A. The 12BZ7 is a 9-pin miniature high-mu twin triode. Untested; sold as found. The box has worn edges and a torn end flap; light dust on the glass.

Early CBS Hytron boxes with the U.S. map logo are attractive to tube collectors. Please see all photos.