ROLA 5B

Manufactured by Loudspeakers (N.Z.) Ltd in about 1954.

Specifications from an advertisement in Radio and Electronics, July 1954.  Found in many early mantle sets. 

Power Handling: 2½ Watts
Frequency Response 145Hz - 6.5kHz
Impedance 3.5Ω @ 400Hz

 

Valves - Lineup not currently known