This Kay has been owned by Don Sickler (founder of Second Floor Music and also a well-known trumpet player) for 55 years.
He holds rehearsals at his place and all the bass players refuse to bring their bass because they love playing this bass so much.
Who has played it: Sam Jones, Christian McBride, Jimmy Garrison, Ray Brown, George Duvivier, John Webber, etc.
The best thing about it is that the strings that are on the bass are the same ones that were on the bass when Sam Jones and Jimmy Garrison were playing on it. They still sound great and it's Don's favorite thing to say "Now your sweat will be mixed in with the sweat of Ray Brown and Sam Jones!" The strings used to be a off-white color. Now after Ray Brown and friends have gone through it, the majority of the strings are a dark green.

EEWWW
I'm curious as to what these strings are. Green silk wrap on the top and bottom. Looks like possibly a steel core, but i'm not really sure but there's some kind of plastic wrap around it.