There are at least two bands named HELLMOUTH
These are photos from concerts where Hellmouth played, so they may be of other bands that played the concert as well.
Black Christmas 2014 Dec 26, 2014 Detroit, Michigan, United States Uploaded by Acuity
Old Gods / Child Bite / Hellmouth / Golden Torso Sep 11, 2014 Detroit, Michigan, United States Uploaded by Acuity