LM Ericsson AB501 Pulpit Telephone

Pauls L.M. Ericsson Model AB 501
1913 Full Size Pulpit - Magneto wall telephone

serial # 1129317 (early 1913)
Magneto Switchook Telephone with Brass and Nickel trim
Framework polished walnut, constructed to hold 2 battery cells

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Type AB 501
called the Full Size Pulpit

Backboard polished walnut.
Seperate Transmitter and OST Receiver,
suspended on a switch-hook

Height of Backboard: 770 mm.
Width of Backboard: 250 mm.
Weight: 9.0 kg

Press button for short circuiting the induction coil and cutting out the ringer coil.
These instruments are fitted with a paper clip. Mother-in-law receiver for use in long distance calls to cover both ears or for two parties to listen to conversation.
Generator RH4600 ring through line resistance of 25,000 Ohm Ringer Resistance: 1000 ohm

Catalog information from LM Ericsson 6th Edition 1911 courtesy STSF

Type AB 501 called the Full Size Pulpit

Type AB 501
called the Full Size Pulpit