CHALLENGE III CHRONOGRAPH-S black steel / Yellow Médium CHALLENGE case Tonneau-shaped, 53.70mm X 41mm Direct Available !! Or ( XL CHALLENGE GT case Tonneau-shaped, 59mm X 45mm Sold Out discontinued!!! ) Medium case is 80% of the time taken The GT case is perfect for people with bigger wrist as 18,5cm (7.28inch) (flat part of wrist > 55mm Cvstos CVS577 Self-winding mechanical, Black PVD treatment or rhodiated, Skeletonized, with function Chronograph, Hour, minute, seconds, Power-Reserve indicator, Skeletonized date disc. CASE Challenge III or Challenge III GT, Tonneau-shaped 53.7 x 41 mm, Tonneau-shaped 59 x 45 mm MATERIAL & COLOR Steel, Black CRYSTAL Sapphire with none-reflective coating on both sides. Caseback Open with sapphire crystal CROWN Screw-down, polished Titanium Grade 5 or 5N Red Gold, rubber insert SCREWS Polished Titanium Grade 5, exclusive CVSTOS TECHNOLOGY pattern DIAL Arabic numerals Exclusive CVSTOS TECHNOLOGY design COLOR Black, Yellow INDEXES Super-Luminova treated HANDS Pierced, chromed and Super-Luminova treated MOVMENT Cvstos CVS577 Self-winding mechanical, Black PVD treatment or rhodiated, Skeletonized FUNCTIONS Chronograph, Hour, minute, seconds, Power-Reserve indicator, Skeletonized date disc POWER-RESERVE 42 hours FREQUENCY 28,800 vibrations/hour NUMBER OF JEWELS 21 BRACELET Std is Rubber Sprint black or yellow or both depending on what is agreed CLASP Double Folding Clasp Photo on wrist: mod medium 41x53,7mm wrist of 18,5cm 7.2inch 41x53.7 mm Medium case direct available This is the very last one ! Cvstos stopped this version !!!