Valvo CCa = E88CC = 6922 Tubes Matched Pair - Holland 1961 7L6 - Same code - NOS

Perfect matched pair of vintage Valvo Heerlen CCa audio tubes - Made in Holland - 1961 - Identical Date Code - Extremely Rare Tube Summary The "textbook Heerlen sound" has been referenced in several Soundlumia listings of Amperex Holland/Philips E88CC/6922 tubes, and many tube enthusiasts asked what that all means. So this is the answer: the late 1950s and very early 1960s tone, the beginning of over a decade's excellence in sound, the classic tonal template for all the great (and greater) Amperex/Philips/Valvo/Miniwatt tubes to be made in the years to come, the timeless Philips radio tone that many of us grew up listening to. And this super rare Valvo CCa yellow print pair is the "crown jewlrey" of all that. Sound Characteristics Be assured - you will not miss one single bit of the legendary Heerlen sound just because the tubes are labeled Valvo. The proud delta symbol in the date code tells you this is 100% "textbook" natural sound from Heerlen: warm and lively tone with infinite