If a crown guard is important for you, the only Hamilton Khaki Field watch with a crown guard would be the Khaki King automatic models. There is one model, that is 40 mm and the dial is a silvery beige, but the hands (and probably the pips) have a green lume. You may want to explore this model further and see if the dial color and the extra 2 mm in size could be something that you are willing to compromise on.. . . Hamilton looks interesting ! Why can't they use a crown guard ? . . ..