RCA 0A4 0A4G Vacuum Tube Valve NOS NIB Transleteronic Both tubes have thin cracks

Both tubes have thin cracks in their bases

gray plates and excellent flashing

It is probably a Mullard

new in box US-made 33GY7A tubes tested to spec on our Paul Hart-calibrated TV7/U

RCA 0A4 0A4G Vacuum Tube Valve NOS NIB Transleteronic Both tubes have thin cracksThis RCA 0A4G regulator tube tested to spec on our Paul Hart calibrated TV7 U. 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