Unlike the collaboration https://www.rlxwx.co.uk with MB&F, which featured a "destro" crown orientation, the Pioneer Cylindrical Tourbillon Skeleton maintains a traditional three o'clock crown that screws down, which helps achieve the watch's 120-meter water-resistance rating. https://www.rlxwx.co.uk/Collection/datejust/ The stainless steel measures 42.8mm × 15.3mm, but it should wear smaller given that the highly domed sapphire crystal adds https://www.rmwx.co.uk/Collection/rm-01/ 3.6mm to the height of the case.