AISI316 stainless steel three pieces case, micro-shot blasted and satin-finished, polished details. Dimensions (approx): diameter 45.00 mm; overall dimensions at crown 54.40 mm; height mm. 57.90 mm; thickness 14.90 mm; screwed crown at 3 o'clock. Four stainless steel lugs, satin-finished. Screwed on place bezel, engraved compass rose (windrose). Sapphire crystal, flat-convex. Srewed on place exhibition back-cover, with flat sapphire crystal.