Only recently have I discovered the use of a breve over the lowercase letter u in Kurrentschrift. Every source I've checked says this was a way to distinguish u from n in handwriting. However I've also seen a couple of book covers where a letter u appears with a breve over it, even though there was no chance of mistaking u for n in the fonts that they employed. My question is: was the “u with breve” ever used systematically in print? By systematically, I mean not sporadically or by some aesthetic choice, but as a standard typographical feature. (The breve in this case would have been carried over from the handwritten form.)
I should note that the two books in question are works by Gunther Plüschow. Plüschow himself wrote his first name using u with breve (Gŭnther) and his signature with this feature seems to have been conspicuous, which maybe led to his books' covers being typeset like that. I haven't found examples from other authors.