I purchased this at an H.P. France store. The strap has discolored due to aging. There is no chain to prevent it from slipping off. The battery is dead, and I have not confirmed its operation, so please be aware of this. The warranty has expired, but I will include the warranty card, etc. I will put it in the included box (slightly damaged) and ship it via either Yu-Yu or Rakuraku Mercari delivery. Please check the condition carefully in the photos before purchasing.