Labeled and boxed as Amperex, Philips or Dumont. Made in Herleen Holland with appropriate delta production code. Highly desirable, premium grade, tube for audiophile and guitar amp applications. Mike: The Heerlen Holland 12AX7's are especially awesome. The high end chime and smooth distortion when cranked in my tweed Bandmaster are just what I was looking for!! John M
Made in the USA. NOS in original boxes.
Original boxes. Labeled and boxed as RCA and National.
Very rare! NOS in original boxes.
Lightly used, test as new. "Almost NOS". Nice sounding Mullard replicas made in Japan, Matsushita, in the 60s/70s.
Long plate 12AX7.
*** ALL BUT THE GRADE 2 (higher than average microphonics) specimens of these are sold out. Here's the same tube that arrived in bulk packaging, and with a different CV number. https://www.kcanostubes.com/node/808#overlay-context=content/nos-sylvani...
NOS in nice original boxes. 1950s/60s. Nice smooth tone, a little less bright than the average 12AX7.