The Book Of Inventions Ian Harrison National Geographic Engraved 6PNPC They measured 82/76 for Tube

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

new in box US-made 12K7GT tubes tested to spec on our Paul Hart-calibrated TV7/U

This lot of four new old stock

This lot of two new old stock

The Book Of Inventions Ian Harrison National Geographic Engraved 6PNPC They measured 82/76 for TubeThis 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