It is all a bit like tring to put you car in revers when moving forward, pretty hard to do but if you force it hard enought the smell of burning metal will be quite strong, on the car that is not the watch. just follow the guide lines and you will be happy,
1 You CAN handwind a 7750.
2 DO NOT change the date between 8pm and 2am.
3 STOP the chrono before reseting
4 Dont Put small children in a tumble drier.
5 Dont put your car in reverse gear when traveling forward.