The school I attended owned a '74 Jazz (complete with covers), and it probably weighed-in at about 11lbs. Amplification was an Acoustic 360. The band leader was a bass-playing nun dressed in a full habit. She got me into the Carol Kaye method, as well as teaching her own style. She played in a swing bass style, and I still smile to this day remembering her big, black, square-toed shoe tapping away as she was 'fully cooking'. 