Way back when, '68 to '71, I played both the Hofner violin and Cavern basses. Thought they were great..for the time. They worked well for the basic rock tunes of the day. But they were fragile. My 1st one delveloped a crack along the binding on the body, but the dealer replaced the bass for me. They had very nice tone for its size. Think I paid something like $300 each for them...now they're like 2300..owww.
But once I heard Yes, ELP, etc, and couldnt get that sound out of them I ended up swicthing to a Ric and a jazz bass.
The Eko bass..can remember lots of people using those during that era too.