Hello,I would like to see what offers come up.This is a ZON CONCORDE 4 String Bass.It was made in the mid eighties.These are very rare and, this is the only one I have ever seen.I have recently recieved confirmation of this from Martin @ ZON Guitars. I was also informed that Joe is in the process of gathering history on these and that info. will be forwarded to me as soon he does. This bass Has the Zon BARTOLINI p/u's and BAROTLINI Pre.It also has a figured maple top and a very slick black body.The fretboard is ebony and very solid and,the neck is one piece Maple. I will consider all offers and,I will say this...I'm really into extended range basses 5,6,ect...If you want to check out my e-bay feedback my account name is bassface2005 I have 100% feedback with 36 transactions... Click here for pics. http://usera.imagecave.com/bassman275/ ....Thanks.