1 Worship of Siva linga is the cultural bond which links metalworkers and seafaring merchants of Sarasvati- Sindhu (Hindu) and Champa-Khmer civilizations. Based on Indus Script deciherment using rebus-metonymy layered cipher, g of linga hieroglyph is read as: [ lkhaṇḍa ] 'metalware'. This indicates contacts of metalworkers and seafaring merchants on Bronze Age Indian Ocean Tin Road. A hypothesis is proposed for further researches in archaeometallurgy and historical linguistics: Cultural links evidenced by the worship of Siva linga is a continuum from cultural contacts of the Bronze Age linking metalworkers and seafaring merchants of Sarasvati-Sindhu (Hindu) and Champa-Khmer civilizations, defining the Tin Road of Hanoi, Vietnam to Haifa, Israel. Discoveries of mukhalinga in Ancient Far East matches with the archaeological discovery of Siva Linga, Bhuteshwar, ca. 2nd cent BCE in the context of a metal smelter hieroglyph. The discovery of siva linga from many parts of Ancient Far East is a defining moment in the researches of cultural contacts between Indian sprachbund and Khmer-Champa civilization, further reinforcing the reality of the Brolnze Age Tin Road which linked Hanoi, Vietnam with Haifa, Israel. Siva linga have been found in Sarasvati-Sindhu (Hindu) civilization area. A remarkable find of siva linga in Mathura of ca. 2nd cent. BCE links the semantics of linga with the metalwork of Bharatam Janam, lit. 'metalcaster folk'. Hieroglyph mukha, 'face' on a siva linga is rebus: muh, 'ingot, quantity of metal taken out of a furnace'. Thus, the mukha linga denotes metalwork smelted out of a furnace. Inscriptions of Indus Script Corpora have been deciphered using rebus-metonymy layered cipher of rendering of hieroglyhphs as Meluhha (Indian sparachbund, proto-Prakritam) metalwork glosses, In this decipherment framework, the gloss loi 'penis' is rebus: lo, loh 'copper' (Prakritam. Meluhha)