MINA = 50 shekels .. old as the Bible

MINA

The mina (also mnaAncient Greek μνᾶ) is an ancient Near Eastern unit of weight equivalent to 50 shekels. The mina, like the shekel, was also a unit of currency; in ancient Greece it was equal to 100 drachmae. The Greek word mna was borrowed from Semitic; compare Hebrew māneh, Aramaic mĕnē, Syriac manyā, Ugaritic mn, and Akkadian manū.

From earliest Sumerian times, a mina was a unit of weight. At first, talents and shekels had not yet been introduced. By the time of Ur-Nammu, the mina had a value of 1/60 talents as well as 60 shekels. The value of the mina is calculated at 1.25 pounds

Ezekiel refers to a mina ('maneh' in the King James Version) as sixty shekels[

4]
Jesus Christ tells the "parable of the ten minas" in Luke 19:11-27. 
From the Akkadian period, 2 mina was equal to 1 sila of water

mna  μνᾶ

man  μᾶν

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