Gibson GA-40 and GA-70 guitar amplifiers
1958 Gibson Electric Guitars and Amplifiers Catalogue Page 30
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Gibson 1958 electric guitars and amplifiers catalogue, page 30. Details of two guitar amps: the GA-40 Les Paul amplifier and GA-70 Country Western amplifier. 1958 zone 1 list price were as follows: Gibson GA-40 $199.50; Gibson GA-70 $260.