Fender 1970 guitar and bass catalog. Page 59. Details of the Fender Bassman amplifier.
The Bassman was effectively a lower powered version of the Super Bassman on page 58; a 50w - compared to the 100w of the Super Bassman. It had six tubes powering a 2x15" cabinet; fitted with either Fender or JBL D-140 speaker cones.
1970 pricing was as follows:
Bassman (Fender speakers) $565
Bassman (JBL speakers) $712.50
An outstanding favorite with bass players the world over
$156
$4500
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$350
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$1200