RCA 1P21 Photomultiplier Vacuum Tube 6R7 Octal T67 It measured 60/60 where minimum

It measured 60/60 where minimum (65%) is 40/40 and 100% is 62/62

They measured 60

phi-shaped mica spacers

They measured 29 and 31 where minimum (65%) is 22 and 100% is 40

RCA 1P21 Photomultiplier Vacuum Tube 6R7 Octal T67 It measured 60/60 where minimumThis 1P21 photomultiplier tubes could not be tested and is sold as is. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. 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