While I just love the original strap on my 5022 Portuguese Perpetual Calendar, it is 5 & 1/2 years old and has darkened to a beautiful, soft, rich patina. There are some signs of wear now showing - so I called my Authorized IWC Dealer last week, and the new, dark brown alligator Santoni strap for deployant has arrived. Very quickly! I am very pleased. These new straps are executed with perfection.