Patek Philiipe Alligator strap 21 mm models (unworn) This Patek Philiipe Alligator strap fits 21 mm models with a 16 mm buckle end. Strap measures 7 1/2 inches approximate. The strap has a matte finish with gray stitching and is unworn. This Patek Philiipe Alligator strap comes with... MSRP: $550.00