This is a pictograph of a measuring rope. It has marks set on the diagonal, which indicates a measurement of approximately three units.
Illustrative Text References:
Alamgirpur: Pottery Bowl Graffiti: Agr-1 A(2): Jagat Pati Joshi and Asko Parpola, 1987: Corpus of Indus Seals and Inscriptions: Volume 1: Page 350: Collections in India: Suomalainen Tiedeakatemia.
Alamgirpur: Pottery Fragment Graffiti: Agr-2 A: Jagat Pati Joshi and Asko Parpola, 1987: Corpus of Indus Seals and Inscriptions: Volume 1: Page 350: Collections in India: Suomalainen Tiedeakatemia.
Comments:
Mahadevan has this Indus sign as 9061, but with a mirrored orientation.
Agr-1 is a bowl shaped pot without a base. It had quite a large diameter (around 57cm).
In both inscriptions Agr-1 and Agr-2, the measuring rope is followed by the numeral seven. It therefore seems likely that the inscriptions gave the diameter of the container in Indus units.
Image Credit:
Measuring Rope: Lynn Fawcett, 2019.