CK 660
FRAMEWORK, polished walnut.

MICRO-TELEPHONE. RE 1051, with cord RS 6500 (Old No. 2061), resting on a cradle switch.

GENERATOR. RH 2400, 2-magnet.

POLARISED RINGER of 1,000 ohms resistance.

LINE CONDENSER of two microfarad capacity.

This telephone has a protector mounted on the lower part of the backboard, and the line terminals are enclosed. It is also fitted with a clip for papers.

When the sub-station telephone and the intermediate station telephone are in connection, their conversation cannot be overheard by the Exchange, or by any of the lines connected, and when the sub-station telephone and she Exchange are in connection, the conversation cannot be overheard by the intermediate station telephone.

Overall dimensions
Height 20.50 inches
Width 8.85
Depth 7.87

Weight 11.7 lbs.