This is vintage IWC  authentic watch , the In side the back case has international watch Co swiss and number 1372180 and has number in the movement 972743 . The diameters 34.5mm with out the crown and lug to lug 41mm . See all photographs including named and numbered Swiss movement genuine watch . The band is generic traps , I'm not guarantee waterproof or pressure tests . The watch running good but need some oil clean because the age and the stems need replace it .The winner item please pay 3 days after auction end , the watch is sold AS IS , can you view the picture lowly please  . The watch shipping by USPS express mail and includes insurance . Only I accept return when item is not description and have a full refund . Thank you for looking and happy bidding !