Fender 1970 guitar and bass catalog. Page 53. Details of the silverface Fender Champ and Fender Vibro Champ (illustrated below) amplifiers.
These small amplifiers are very well known, selling in large numbers throughout the 1970s - the Champ was the lowest price tube amp in the Fender line, and was the first amp of very many guitarists. Both had a power rating of 6w and a single 8" speaker. Controls are: volume, treble, bass (plus speed and intensity on the Vibro Champ). The Champ had 2 tubes, the Vibro Champ 3.
1970 US list prices were:
Champ $78.50, Vibro Champ $99.50
Ideal choice for students and beginners
$3495
$950
$3299
$1095
$2700
$720
$1450
$1599
$2667
$900
$750
$2000
$3495
$3800
$1295
$1195
$2799
$60
$1295