if followed by /β/. Cf. /ˈoːwum, ˈkolubra/ > /ˈɔβu, koˈlɔβra/ > Italian uovo, Sardinian colòra. /a/ may yield a mid vowel if preceded by /j/. Cf. /jakˈtaːre/...

behavior happens also in Italian with a restricted number of words (e.g. un uovo "an egg", il braccio "the arm" masculine in the singular, le uova "the eggs"...