The Indus Dictionary Project
This is a pictograph of a horn. The number of segments indicates the size of the horn, which is four Indus units. The size is determined by the type of horn. The type of horn would in turn, suggest the usage and value.
Harappa: Cube-shaped Seal: H-612 f: Sayid Ghulam Mustafa Shah and Asko Parpola, 1991: Corpus of Indus Seals and Inscriptions: Volume 2: Page 301: Collections in Pakistan: Suomalainen Tiedeakatemia.
Inscription H-612 refers to a shipment of weapons. It is therefore possible that the weapons were maduvu. However, I should stress that this is my conjecture. The maduvu is made from blackbuck horn. Blackbuck horns are 35 to 75 centimetres in length.
Indus Script Sign Number 4460: List of Sign Variants: Iravatham Mahadevan, 1977: The Indus Script: Texts, Concordance and Tables: The Director General Archaeological Survey of India.