Here is some information from the Sadowsky site.
Sadowsky Guitars is extremely proud to announce the release
of the Jim Hall Signature Model Archtop Guitar. The result of
4 years of prototyping and collaborating, the Jim Hall
Guitar is designed for the working musician as well as the
discriminating collector. Sadowsky Guitars is honored to
have this association with the premier jazz guitarist, Jim
Hall.
Sadowsky Guitars has maintained and repaired the guitar that James
D'Aquisto made for Jim Hall. This guitar has been Jim's main guitar for
the last 15 years. Roger and Jim began to collaborate on a Sadowsky
model that would be more than just a copy of his D'Aquisto. In addition,
Roger and Jim were both committed to the idea that this would have to be
a guitar that Jim would personally play, not just endorse. The Sadowsky
Jim Hall guitar meets all of Jim's requirements as a player.
After numerous prototypes, Roger continued to refine the guitar by
reducing the thickness of the plates to provide a more acoustic
response, reducing the depth to control feedback, designing a new ebony
tailpiece with a string ground and reworking the neck until if felt just
like Jim's D'Aquisto. Special attention was paid to an all
nitrocellulose lacquer finish with a distinctive "Jim Hall Sunburst".
Incorporating Roger's sense of aesthetics and design, the result is a
beautiful looking, feeling and sounding guitar that has been
enthusiastically received by Jim.
JIM HALL SIGNATURE MODEL ARCHTOP Frequently Asked Questions: link
See the August 2004 issue of
Just Jazz Guitar
for an article about the Roger Sadowsky build Jim Hall model guitar.
All pro NY guitarists like Jim Hall and Steve Khan take their guitars
to Rodger's shop.
More information available on listing's web site.