From the Ishimori website:
"We finally completed the Wood Stone tenor saxophone by combining our knowledge and experience repairing saxophones that we have accumulated for half a century. It features quick response, great intonation, and smooth key action and quality sound. You can blow comfortably through the whole range.
'AF model'= the Antique Finish model. This model is reminiscent of the vintage saxophone and has a dark and rich sound. This currently is the closest saxophone to the vintage one."