The Japan only stainless version for 150 anniversary. Golden medallion on back. I believe this has the full kit the watch came with. It includes a certificate of archive showing Mfe in 1988 and sale in 1989. A receipt for service by Patek of Japan shows service in 1997. 150 total made. A friend read the kanji and believes it received a slight polish. Patek strap virtually new (worn twice) with marked buckle and crown. Enamel dial highly legible. I am desirous of sellin—-let’s talk.