Is a Japan only model was unveiled to commemorate the 150th anniversary. It is a rare stainless steel Calatrava. Calibre is equipped with the same Cal.215, 3796. Dial with enamel textured off-white dial luxury. Buckle buckle marked Calatrava in, in Japan only release the SS Ref.3923 was also used in old SS model was used this buckle. Back representing 150 years of 1839-1989 marked 18 K menu da Rio, Wi-Fi. Models are decorated Medallion in Patek Philippe model outside this commemorative model No. Turns out that was made very special model. It is a well-preserved collection of the remaining lugs edge hair line also featured solid.