Labeled and boxed as General Electric (GE).
Manufactured by Tung Sol, labeled and boxed as GE, Sylvania, RCA, Raytheon, CBSetc. Great in your tweed Bassman and other Fenders and boutique amps that require 5881s.
Mike, 3 more matched pairs of the Tung Sol 5881 "Christmas Specials" (RCA label). The three pairs that you sent prior were really excellent specimens visually and sonically. Thanks. John
5881 and 6L6WGB designations are interchangable and the tubes may have either or both designations. Lightly used, test as new. NOS (unused) examples are very expensive, so this is a great way to get in on the TONE! The bases are various shades of brown and may not match. These have a mixture of different brand names including, Tung Sol, RCA, GE, Philips, Sylvania, CBS, etc. All are identical and made by Tung Sol. Matched pairs may comprise 2 different brands but the tubes are identical and made by Tung Sol. First priority is electrical matching.
BEST PRICE ON THE WEB! These work great in old Fenders requiring 5881's or 6L6's. Good substitute in 6L6GC amps where less headroom (breakup at lower volumes) is desired. Also make great replacements in Fender Deluxe's where more clean headroom is desired. Just plug into your Deluxe and re-bias, no circuit changes required. Excellent choice for most 6L6GC amps if you'd like a little less clean headroom. These hold up well in amps with plate voltage up to 470 volts.