<-- That is Exactly what I was wondering and how to I dentify the Factory upgraded ones
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Just spoke to Fender and the Upgraded Versions ~ Predom. White + Predominately Black ( Gold + Black = EL34 ) have Stacked Concentric pots for the Gain/Volume which I didn't know or see . He also has owned both and prefers the EL34 Cranked up for the Top end Tones that He said are fuller . I played the EL34 version few weeks ago ( the 6L6 a couple yrs ago) and it did hold up very well Crankin' and the decision part will be harder now ~ between the 2 tube Configs