Galvanometer No. 1
A 43ohm + 43ohm, differential Galvanometer with four terminals.
Used on Duplex and Quad circuits.
Specification - TG2015.
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Galvanometer No. 2
A Galvanometer which contains four separate coil coil circuits each
of 38ohms.
It is a double differential 8 terminal type for
use on double wire working on underground circuits with universal
batteries.
Diagram - TG 471.
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Galvanometer No. 21
This is a 10ohm clearing
indictor used on the Indicators F.A. and Telephone, Brown.
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Galvanometer No. 22A
A 30ohm Galvanometer with a 1000ohm shunt and an engraved dial.
Used on D.C.S. and S.C.S. circuits.
Specification - D86B
and TG2014.
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