L. M. ERICSSON TELEPHONE No. 306
No. 306 Similar to No. 305, but fitted with a three-magnet generator No. 486, which will ring satisfactorily, through the 300 ohm bell of the instrument and a line resistance of 15,000 ohms.
Weight 9.9 lbs.
Price £3.
Renumbered as the AB 105.
Taken from the Ericsson Telephone Catalogue 1903