This is used for testing the lines at the test board in order to ascertain
whether a fault
is inside or outside the Exchange. Fitted with hand micro-telephone No. 522 with cord
No. 2142, galvanometer, five-magnet magneto generator No. 478, two bells, a three-way
switch, four testing keys, and a two-way plug and cord.
Weight 26.5 lbs. Price £11 5s.
Taken from the Ericsson Telephone Catalogue 1903
This is used for testing the lines at the test board in order to ascertain
whether a fault
is inside or outside the Exchange. Fitted with hand micro-telephone No. 522 with cord
No. 2142, galvanometer, five-magnet magneto generator No. 478, two bells, a three-way
switch, four testing keys, and a two-way plug and cord.