3 Zenith 17CK3 Vacuum Tubes Valves NOS NIB Lot Of Three Tray 9P new in box Sylvania 5BC3

new in box Sylvania 5BC3 tested to spec on our Paul Hart-calibrated TV7/U

This pressing has moderate surface noise audible in quiet passages and in moderate passages

Is it a Mullard

They tested as follows: 55

This tube has black plates

3 Zenith 17CK3 Vacuum Tubes Valves NOS NIB Lot Of Three Tray 9P new in box Sylvania 5BC3Thes three new old stock, new in box Zenith 17CK3 tubes tested to spec on our Paul Hart calibrated TV7 U. BECAUSE OF THE BIZARRE, INTRUSIVE AND DRACONIAN GERMAN PACKAGING REGULATIONS AND THE SEVERE FINES AND PRIVACY INTRUSIONS ASSOCIATED WITH THEM WE NO LONGER SHIP TO GERMAN ADDRESSES. WE WILL HAPPILY SEND YOUR PACKAGE TO A NEIGHBORING COUNTRY OR MAKE SUITABLE ARRANGEMENTS. IN 2021 WE PURCHASED 150,000 VACUUM TUBES. IF IT'S NOT LISTED, WE PROBABLY