CINTURINO OROLOGIO OYSTER 20 MM ADATTO PER ROLEX SUB GMT DATEJUST FLIP LOCK DUE TONI S/GD
Insert the right size screwdriver blade into the screw head in the link. Turn the screwdriver counter-clockwise to loosen the screw. It has a brushed (matte) finish on the outside and shiny finish in the middle.