1 X CV228 VALVE STC BRITISH HEIL H-wave OSCILLATOR NOS NIB England Vintage RARE

2nd photo is for reference only no paper included JUST THE TUBE AND ORIGINAL BOX AND ALL ITS PACKAGING

I HAVE NO WAY OF TESTING THIS BEYOND CONTINUITY WHICH IS GOOD

CAME FROM A LARGE COLLECTION OF RARE BOXED NOS MILITARY TUBES WHICH THE ONES I can test ON A REGULAR TUBE TESTER HAVE CHECKED OUT .

SEE ALL PICTURES AND *****FEEDBACK**