A Pim as mentioned in 1 Samuel 13:21 was a medium of exchange in Israel before the shekel and before the babylonian captivity. What was a pim? The answer to that question remained a mystery until 1907 when the first pim weight stone was excavated at the ancient city of Gezer
Babylonian captivity (or Babylonian exile) during which Jews of the ancient Kingdom of Judah were captives in Babylonia. Biblical depictions of the exile include Book of Jeremiah 39–43 (which saw the exile as a lost opportunity); the final section of 2 Kings (which portrays it as the temporary end of history); 2 Chronicles (in which the exile is the "Sabbath of the land"); and the opening chapters of Ezra, which records its end. Other works about the exile include the stories in Daniel 1–6
Babylon. The Cyrus Cylinder: an ancient clay cylinder with a written declaration in Akkadian cuneiform script in the name of Cyrus the Great, ca 539–530 BC: discovered in the ruins of Babylon in 1879. It declares Cyrus’ policy of the repatriation of the Jewish people following their Babylonian captivity, as the text refers to the restoration of cult sanctuaries and repatriation of deported peoples.
Therefore, thus says the Lord: I am going to give this city into the hands of the Chaldeans and into the hand of King Nebuchadrezzar of Babylon, and he shall take it. The Chaldeans who are fighting against this city shall come, set it on fire, and burn it, with the houses on whose roofs offerings have been made to Baal and libations have been poured out to other gods, to provoke me to anger. -Jeremiah 32:28-29(NRSC)