YOU ARE BIDDING ON A VINTAGE 1950'S RARE MULLARD ECL82 6BM8 TUBE BROCHURE. IT HAS 2 DIAGRAMS ON THE BACK SHOWING THE VERSATILITY OF THE ECL82 TUBE. IT IS IN NICE CONDITION FOR ITS AGE WITH SOME LIGHT WEAR, OLD 3 RING BINDER HOLES AND OLD CREASE LINES. PLEASE LOOK AT ALL PHOTOS AND ASK ANY QUESTIONS YOU MAY HAVE. REMEMBER THAT I SELL MOSTLY ANTIQUE AND VINTAGE ITEMS AND THAT THEY ARE MOSTLY LIKELY NOT BE PERFECT DO TO THE NATURE OF THEIR AGE. IF YOU HAVE A PROBLEM PLEASE CONTACT ME BEFORE LEAVING FEEDBACK.