General Electric GE 12EQ7 Vacuum Tube Valve NOS NIB Short Base I am playing it in

I am playing it in Bottlehead Crack headphone amplifier as a 12AU7 substitute and it sounds fine

a third mica spacer for increased vibration resistance and lowered microphonics

new in box GE 25C5 tube tested to spec on our Paul Hart-calibrated TV7/U

generous flashing and an anode radiator for cooler operation and longer life

Tube One's etching is "5654" while Tube Two's is "6AK5

General Electric GE 12EQ7 Vacuum Tube Valve NOS NIB Short Base I am playing it inThis new old stock, new in box GE 12EQ7 tube tested to spec on our Paul Hart calibrated TV7 U. BECAUSE OF THE BIZARRE, INTRUSIVE AND DRACONONIAN GERMAN PACKAGING REGULATIONS AND THE SEVERE FINES AND PRIVACY INTRUSIONS ASSOCIATED WITH IT 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 HAVE IT.