https://tinyurl.com/y956c4p4
This is an addendum to: Itihāsa. With a large cache of Dilmun seals, Indus Script Corpora has grown to c. 30,000 insciptions of wealth-accounting ledgers https://tinyurl.com/y8rj5xpd
This monograph posits that Dilmun Meluhha metalsmiths and seafaring merchants were the first to introduce 1) an accounting system of खरड kharaḍa 'wealth-accounting ledger' of metalwork transactions; and 2) to create a guild of armourers of an extensive civilization which stretched from Hanoi (Vietnam) to Haifa (Israel), from 4th millennium BCE..
A Dilmun Seal in Met Museum
Dilmun. Steatite or chlorite. 2nd m.BCE; 0.47 in. (1.19 cm) Accession Number 1987.96.22 The field symbol is dominated by a caprid. Caprid is a member of the goat family. A seal from Dholavira shows a kid which becomes the artistic model adopted as the Dilmun standard on hundreds of Persian Gulf seals.
117 antelope/caprid; sun motif. Dholavira seal impression. arka 'sun' Rebus: araka, eraka 'copper, moltencast' PLUS करडूं karaḍū 'kid' Rebus: करडा Hard from alloy--iron, silver &c. Thus, together, the rebus message: hard alloy of copper.
Hieroglyph: करडूं karaḍū 'kid' Rebus: खरड kharaḍa f (खरडणें) A hurriedly written or drawn piece; a scrawl; a mere tracing or rude sketch. 2 Vehement reviling or abusing. v काढ g. of o. निघ g. of s. 3 The ashes and earth which gather about an ingot of metal during its formation. So called because to be detached they must be scraped off.; खरडणें kharaḍaṇēṃ v c To scrape or rub off roughly: also to abrade or graze. 2 To rub up; to grub up; to root out (grass, weeds &c.) by pushing the instrument along. 3 To shave roughly, to scrape: also to write roughly, to scrawl: also to jot or note down; to make brief memoranda: also to draw roughly; to plough roughly; to grind roughly &c. &c.; खरडा kharaḍā m (खरडणें) Scrapings (as from a culinary utensil). 2 Bruised or coarsely broken peppercorns &c.: a mass of bruised मेथ्या &c. 3 also खरडें n A scrawl; a memorandum-scrap; a foul, blotted, interlined piece of writing. 4 also खरडें n A rude sketch; a rough draught; a foul copy; a waste-book; a day-book; a note-book.
करडा ṭ karaḍā m The arrangement of bars or embossed lines (plain or fretted with little knobs) raised upon a तार of gold by pressing and driving it upon the अवटी or grooved stamp. Such तार is used for the ornament बुगडी, for the hilt of a पट्टा or other sword &c. Applied also to any similar barform or line-form arrangement (pectination) whether embossed or indented; as the edging of a rupee &c. kolmo 'three' rebus: kolimi 'smithy, forge'.
The back of the Dilmun seals has three lines and dotted circles. These hieroglyphs signify smithy/forge of a smelter.

http://www.penn.museum/sites/expedition/shipping-and-maritime-trade-of-the-indus-people/ baṭa 'six' rebus: baṭa 'iron' bhaṭa 'furnace'.PLUS करडूं karaḍū 'kid' Rebus: खरड kharaḍa 'wealth-accounting ledger', karaḍā करडा 'hard metal alloy'
Dotted circle as a hypertext: dhã̄i 'strand' PLUS vaṭa ' string' vaṭṭa 'circle' rebus:dhāvaḍ 'smelter'.PLUS kolmo 'three'rebus: kolimi 'smithy, forge'. Thus, smithy/forge of smelter.
117 antelope/caprid; sun motif. Dholavira seal impression. arka 'sun' Rebus: araka, eraka 'copper, moltencast' PLUS करडूं karaḍū 'kid' Rebus: karaḍā करडा Hard from alloy--iron, silver &c. Thus, together, the rebus message: hard alloy of copper..
kuṭhāru कुठारु a monkey; Rebus: kuṭhāru कुठारु 'armourer' फडा phaḍā f (फटा S) The hood of Coluber Nága Rebus: phaḍa फड 'manufactory, company, guild, public place' Ta. kōl stick, staff, branch, arrow. Ma. kōl staff, rod, stick, arrow. Ko. ko·l stick, story of funeral car. To. kwï·s̱ stick. Ka.kōl, kōlu stick, staff, arrow. Koḍ. ko·lï stick. Tu. kōlů, kōlu stick, staff. Te. kōla id., arrow; long, oblong; kōlana elongatedness, elongation; kōlani elongated. Kol. (SR.) kolā, (Kin.) kōla stick. Nk. (Ch.) kōl pestle. Pa. kōl shaft of arrow. Go. (A.) kōla id.; kōlā (Tr.) a thin twig or stick, esp. for kindling a fire, (W. Ph.) stick, rod, a blade of grass, straw; (G. Mu. Ma. Ko.) kōla handle of plough, sickle, knife, etc. (Voc. 988); (ASu.) kōlā stick, arrow, slate-pencil; (LuS.) kola the handle of an implement. Konḍakōl big wooden pestle. Pe. kōl pestle. Manḍ. kūl id. Kui kōḍu (pl. kōṭka) id. Kuwi (F.) kōlū (pl. kōlka), (S. Su.) kōlu (pl.kōlka) id. Cf. 2240 Ta. kōlam (Tu. Te. Go.). / Cf. OMar. (Master) kōla stick. (DEDR 2237). Rebus: kol 'working in iron' kolhe 'smelter'.