A tantra yukti category of research is Atideśa (indication or application). On some inscriptions, an additional orthographic device is used to indicate that a metal implement is the product being managed by a Supercargo. 

An example can be cited of a Chanhudaro seal, where a double-axe is part of the inscription. It is inferred that the double-axe signifies a metal axe. This inference is validated by decipherment of the entire inscription including the pictorial motifs of a goat-antelope and hypertext.

C-23

Text 6402 6Goat-antelope with a short tail.

The object in front of the goat-antelope is a double-axe.

Double-axe found in a Mesopotamian site. Comparable to the double-axe shown on Chanhudaro seal C-23.  Pictorial motif of a double-axe is an Indus Script hieroglyph (Pict-133). 

  

 

 The fact that these hieroglyph compositions occur on bronze artifacts imply that the bronze metalwork is signified.