Here is a chart to help “decode” the model numbers of vintage Fender amplifiers. There is usually a model number on the tube chart on the inside wall of the amplifier’s cabinet. Some examples of a model number would be 5E3, 5F6-A and 6G3. See what these numbers mean below.

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The 1st number denotes the year:

5 = 1950’s era
6 = 1960’s era

The 2nd letter denotes the year that corresponds to the cabinet type:

A = 1950-51, TV Front
B = 1952-53, TV Front, Wide Panel
C = 1953-54, Wide Panel
D = 1954-55, Wide Panel
E = 1955-61, Narrow Panel
F = 1956-61, Narrow Panel
G = 1960-64, Brown, Blonde, and Early Black Tolex

The 3rd Number denotes the amp model:

1 = Champion or Champ
2 = Princeton
3 = Deluxe
4 = Super
5 = Pro
6 = Bassman
7 = Bandmaster
8 = Twin
9 = Tremolux
10 = Harvard
11 = Vibrolux
12 = Concert
13 = Vibrasonic
14 = Showman
15 = Outboard Reverb Unit of the Pre-CBS Period
16 = Vibroverb

A Letter following the 3rd number denotes a revision of the amps circuit. For example 5F6-A or 5E4-A.

Photos provided by MyFenderChamp.com. A really cool blog about the mighty Fender Champ!

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