This item was released to commemorate the 20th anniversary of ZUCCa, with only 888 pieces sold. Released on August 8, 2008. The calculation formula converting 20 years into seconds is engraved on the back of the leather band. The back of the leather band has some stains and the band is starting to deteriorate. Regarding the watch itself, the battery has not been replaced, so its functionality is unknown. Please understand this before purchasing.