This is describing hemochromatosis. Happens in men more often than women (menses is a protective factor for women in this iron-overload state), and he's also over the 40 year-old barrier between Wilson and hemochromatosis.
He's got bronze diabetes: hyperpigmentation and high resting glucose. Also has cirrhosis.
According to FA '19 (p. 389): classic heart issue is restrictive CM, but it also causes a dilated cardiomyopathy as seen in this vignette.