Here is a very large and unusual vintage RCA 5820 Image Orthocon vacuum tube, in original plastic RCA tube. Looking to date from the 1940's into the 60's, I believe this tube went in a commercial tv studio camera. Tube looks to be in very good condition, has something rattling around inside, since plastic tube was opened, this may be an old tube put in the box of the replacement, not sure. Plastic tube in very good condition with nice period style graphics, only damage is where seal is broken, measures 15 5/8" long and 3" in diameter. A great vintage RCA Image Orthocon 5820 tv studio camera vacuum tube in original plastic tube, will make a very nice addition to your collection! Feel free to email me with any questions you may have. Buyer only pays actual shipping cost with no handling charges.