Unused tubes purchased for preamp use (so they should be very quiet) several years ago and in original boxes. I don't recall what tube tester was used, however one tube measured 17/17 and the other measured at 17/19. Measurements are written on inside of flaps. Tubes have large halo getter and it appears that the date codes are stamped on top of the tubes. (photo) I will throw in a 3rd tube at the asking price. From the tube depot website: "SQ stands for Special Quality and was only given to tubes that passed stringent quality standards. Philips made tubes for many brands like Amperex, but Philips Miniwatt is the real name. Made in the Heerlan plant in Holland, these tubes are known for their lush, almost liquid midrange. They exhibit a sweet top end and are very 3 dimensional." Shipping to lower 48 states and PP fee included at asking price.
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