Maybe the Tailors style or , it was designed this way ....for whatever reason. It sure does have the John Travolta look going for it though!
..One thing that really bothers me is the tabs,also they were not sewn on correctly and look out of place. I've never seen an original tunic where the tab overhangs the edge of the collar. This makes me wonder what else has been added to the tunic or if it was an early style reworked.