Out of curiosity, does the case back tell you whether its rose gold or yellow gold? I know this watch is YG 18k, but generally speaking when looking at dress watches?
No, that is not specifically marked on the case AFAIK. It's usually obvious to the eye, especially in comparison to other cases, but there are various gradations of rose and pink gold, even from the same makers, through the decades. Sometimes artifact of lighting makes a YG case seem rosish.