Essen-type z-cut quartz ring, plated and notched

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Essen-type z-cut quartz ring, plated, notched and provided with silver connecting wires. Part of a series of 11 objects demonstrating how a crystal plate or ring is mounted for use in a quartz oscillator.


Time Measurement
Object Number:
1947-311 Pt18
z-cut quartz ring
BT Museum; General Post Office

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