This is a pictograph of a porter carrying sacks. The headgear of a person in an Indus sign may give us information about who they are. In this instance, the porter's head has been replaced by the
verb to carry. Thus, this is the noun sack bearer.
Illustrative Text Reference:
Mohenjo-daro: Tablet in bas-relief: M-1419 A: Sayid Ghulam Mustafa Shah and Asko Parpola, 1991: Corpus of Indus Seals and Inscriptions: Volume 2: Page 191: Collections in Pakistan: Suomalainen