To say things honestly I was not at all familiar with the rickenbacker 620, not the same way I am with a Fender or a Gibson or a Les Paul.
In fact I don’t know of any well-known artist who uses it, except Joe Walsh of the Eagles, who uses a solid body Glenn Frey Signature Rickenbacker. I’ve discovered that Mike Campbell of Tom Petty and the Heartbreakers uses it too. It’s a guitar known mainly for its uniqueness and design rather that topnotch sound for most modern music. I gather it was very popular back in the 60’s and 70’s.