I recently acquired a Der Fliegeruhr Chronograph Automatic REF. 3706 as a hand me down gift. i read the manual and set the time correctly, according to the manual. i noticed that although the date indicator (number) does change at 12am the day indicator does not. it lags behind and changes around 5pm. this surely cannot be normal. any related problems? suggestions? I really hope the movement is not damaged :( keep your fingers crossed!
thanks