CASIO fx-650

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Date of acquisition: 2013/05/20
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Watch model : fx-650M

 Differences with fx-600 model : 10+2 digit screen and availability of physical constants (speed of ligth in vacuum c, planck's constant h, gravitational constant g, elementary charge e, electron rest mass me, atomic mass unit u, Avogadro constant k, molar volum of ideal gaz at S.T.P. v).