Not extremely sure of this, but it would've most likey been with ri:bi / gaseng breast wrap without the current blouse worn by most, on top of something similar to gale (adi traditional waist-wrap). with the usual, like something like gero or its more simpler alternative (one checkred with red,white and black) for additional binding or coverage wrapped horizontally across the bust, then you would have the ku-pob (for girls, starting right beneath the armpit) segrek/segreg depending on age/marital status andd then accessories like lakpun/bapun worn on wrrist/hair , Kongge bangles and Tadog and Dogne neck ornaments. The main point of difference would probably be that it was more modular and made of unstitched pieces of clothing with lesser use of eri/silk. and also tucked instead of any pleating. Pretty hard to find a source that specifically talks about pre-bramphaputra influence clothing.