I have a love/hate relationship with this watch...
I love it, because it's one of the most beautiful vintage Rolex in my opinion. What stands out to me is that it is one of the few Rolex where the acrylic crystal sits very low above the dial. The 6542 is one of the few watches that strikes a perfect balance between looking different & unique and modesty.
I hate it, because finding gen parts for it, especially for the movement, is virtually impossible. Why you ask? Because across the entire Cal. 1030 movement family (1030, 1035, 1036, 1040, 1055, 1065 & 1066), there is only a single reference [the 6542], which used a GMT Version of these movements. To make things worse, even the parts that look identical to those of a regular Cal 103X or 106X, have slight differences which will drive you nuts when assembling the watch with non-GMT versions (calendar ring, hour wheel, cannon pin, etc.).
Anyway...