ATM TELEPHONE T.3903ATM TELEPHONE T.3903
Mining Telephone
CERTIFIED SURFACE TYPE MAGNETO TELEPHONE
Mines Department Certificate No. T/Tel/8.
Desk Pattern T.3903
This Telephone is certified by the Mines Department as being intrinsically safe for
surface use only, and is suitable for inter-connection with any approved magneto telephone
system, the generator being fitted with a non-inductive shunt and the ringer shunted by an
approved condenser. It is fitted with a hand microtelephone of the B.P.O. standard design,
incorporating an approved design of transmitter.
Height 10.5in; width 10in. depth 6.5in.
Weight 12lbs. Price £6.1.0
Taken from the A.T.M. Mine Telephones and Signalling Equipment Book - April 1939
Two-cell Battery Box for T.3903 Telephone (T.4651A)
Oak cover polished finish with hook and eye fastener.
Height 4.5in. width 3.75in. depth 2.5in.
Needs two T.2190 Dry Cells for T.3903 Telephone
Taken from the A.T.M. Mine Telephones and Signalling Equipment Book - April 1939
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Last revised December 01, 2007
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