Naram-Sin of Akkad
Following the unification of the city-states in Assyria and Sumer by Sargon of Akkad into a single empire ruled from his home city circa 2334 BC, common Mesopotamian standards for length, area, volume, weight, and time used by artisan guilds in each city was promulgated by Naram-Sin of Akkad (c. 2254–2218 BC), Sargon's grandson, including those of shekels. "Codex Hammurabi" Law 234 (c. 1755–1750 BC) stipulated a 2-shekel prevailing wage for each 60-gur (300-bushel) vessel constructed in an employment contract between a shipbuilder and a ship-owner. Law 275 stipulated a ferry rate of 3-gerah per day on a charterparty between a ship charterer and a ship-owner. Law 276 stipulated a 2-gerah per day freight rate on a charterparty, while Law 277 stipulated a -shekel per day freight rate for a 60-gur vessel.