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ESI Impedance Bridge 250-DA Eletromesurements Inc. Not sure if it works. Thinknit dose. Just old. Maybe parts only
ESI 253 impedance meter inductance capacitance resistance lcr
*TC* ESI IMPEDANCE BRIDGE MODEL 250-C1 (WCS75)
*TC* ESI IMPEDANCE BRIDGE MODEL 250-DA (WCS49)