For sale is a 2003 prototype for the 503 model. This was made by John Kinnaird. Setup and playability are fantastic and it has the ultra dry pop of the original guitars. This is a very traditional sounding box, in excellent condition. Being nearly 20 years old, it does have a couple of dings, but nothing structural and no repairs have been made on the instrument. $2000 plus shipping and any payment fees.
Here's a link to a few pictures.