APSF Factory GMT-Master II VR3186 904L SteelMOVEMENT: Asian Clone 3186 Automatic Movement at 28800 vph, Correct Handstack, self-winding, independent adjustable hour hand to set the date, same setting as genuine. Stable. VR3186CASE DIAMETER: 40mmTHICKNESS: 12.5mmDIA..