The Book Of Inventions Ian Harrison National Geographic Engraved 6PNPC There is also a shield

There is also a shield between the triodes for reduced cross talk

CRUEL AND DRACONIAN GERMAN PACKAGING REGULATIONS -- AND THE SEVERE FINES AND PRIVACY INTRUSIONS ASSOCIATED WITH THEM -- WE NO LONGER SHIP TO GERMAN ADDRESSES

They measured 82/76 for Tube One and 85/74 for Tube Two

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The Book Of Inventions Ian Harrison National Geographic Engraved 6PNPC There is also a shieldThis gilt edge, copiously illustrated book is in excellent condition. The spine is in fine shape with no loose pages and APPEARS to be leather bound. MOST FORMS OF SHIPPING EXCEPT MEDIA MAIL ARE AUTOMATICALLY INSURED UP TO $100. ETSY PURCHASE PROTECTION COVERS ITEMS UP TO $250 IN VALUE. IF AN ITEM IS MARKED "DELIVERED," AND YOU HAVE NOT ACTUALLY RECEIVED IT, THE FIRST STEP IS FOR YOU TO CONSULT YOUR MAIL CARRIER TO GET THE EXACT COORDINATES OF THE