Beatles / Beatle violin bass guitar. Original models of this iconic shape instrument were introduced in the 1950s, with replicas like this still made Stock Photo - Alamy
Classic studio techniques - Getting the Beatles “Pepper”-era bass - Produce Like A Pro
Beatles Bass - Johnson Guitars Beatles Bass - Audiofanzine
Colts owner Irsay 'reunites' Beatles with purchase of Paul McCartney bass guitar – Indianapolis Business Journal