ALL 12 HAVE PASSED A SIMPLE CONTINUITY TEST. THERE IS A 13TH TUBE INCLUDED IN THIS AUCTON, BUT THIS TUBE DOES NOT PASS A FILAMENT CONTINUITY TEST, AND IS THEREFORE PRESUMED TO BE “BAD”. I WILL LABEL IT WITH A STICKY NOTE SO YOU DON’T HAVE TO RETEST EVERYTHING TO FIND IT. ALL BUT THE TWO BOXED NATIONAL UNION TUBES SEEN IN THE SECOND PHOTO HAVE NO MAKER BRAND, BUT DO HAVE THE SAME STYLE OF STENCILING OF THE TUBE NUMBER AS THE TWO NATIONAL UNION TUBES. IT MAY FOLLOW, THEN, THAT THEY ARE ALL NATIONAL UNION BRAND. EXCEPTING THE TWO BOXED TUBES SEEN IN THE PHOTOS, ALL OF THE TUBES WERE FOUND WRAPPED IN BUBBLE WRAP, COCOA FIBER OR HEAVY GREY INSULATING WRAP. ONLY PRESUMED AS “USED”, SINCE I HAVE NO ACTUAL WAY TO TELL WHETHER THEY HAVE BEEN USED OR NOT. THEY HAVE BEEN SITTING IN THESE BOXES, UNDISTURBED FOR SEVERAL YEARS AND WERE PART OF MY FATHER’S (W9OLD) HAM RADIO COLLECTION. PLEASE SEE PHOTOS FOR DETAILS ON EACH TUBE. I WILL BE LISTING MANY OTHER BOXED QUANTITIES OF VINTAGE HAM RADIO AND TELEPHONE SWITCHING OFFICE COMPONENTS IN FUTURE, AS WELL AS SEVERAL VINTAGE RECEIVERS, TRANSCEIVERS, TRANSMITTERS AND BOXED PIECES OF TEST EQUIPMENT. The item “VINTAGE HAM AMATEUR RADIO VACUUM 12 TUBES TUBE LOT TRANSMITTER 813 VT 144″ is in sale since Sunday, November 13, 2016. This item is in the category “Consumer Electronics\Radio Communication\Ham, Amateur Radio\Other Ham Radio Equipment”. The seller is “trukkcp” and is located in Boerne, Texas. This item can be shipped to United States, to all countries in Europe, to Canada, to Australia, to Japan, to China, KR, ID, to Taiwan, to Hong Kong, IL, to New Zealand, SG, SA, AE, QA, KW, BH, MY.