"Mickey" has always been a popular nickname for the given name Michael or for a surname which begins with "Mc" or "Mac". The stripes on his lower left sleeve are service stripes. Commonly called "hashmarks", each stripe represents four years service. The insigne on his upper sleeve is his rating. The eagle - commonly called a "crow" - signifies he is a petty officer. The stripes (inverted chevrons) identify him as a third class (one chevron), second class (two chevrons), first class (three chevrons) or chief petty officer (three chevrons with an arc connecting the two ends of the uppermost chevron). You're probably right; it's virtually hopeless to trace his identity without, at the very least, a last name.