Loudspeaker Rola G. 12 Permanent Magnet or Field coil

The G.12 Loudspeaker is available with a Permanent Magnet Alcomax II G.12 P.M. or with a Field Coil G.12 D.C. at various prices and configurations as below.

G.12 P.M.  Less Transformer                                            £ 4 16 0
G.12 P.M.  With Transformer                                            £ 5 5 0
G.12 D.C.  Complete with Transformer, Mounting Stand, Handle                          and base                                                         £ 5 5 0
G.12 D.C.  With Mounting Stand, Handle and Base, but without                          Transformer                                                     £ 4 16 0
G.12 D.C.  Stripped but With Transformer                        £ 4 4 0
G.12 D.C.  Stripped and Without Transformer                  £ 3 15 0

(When ordering please state Field Resistance and Impedance of Transformer required.)
For Public Address work, both the P.M. and Energised Models can be supplied with a 15 Ω Voice Coil at an additional charge of 3/-.

So widely has the phenomenal performance of the Rola G.12 become recognised that it is true to say that it is a speaker that sells the set.
Once you have heard the remarkable fidelity of this unit you will be content with no receiver that is not G.12 equipped. You will discover too, that the mere presence of a G.12 in a radio receiver affords proof of its quality, for it would pay no manufacturer to install this unit in a set that was not able to do full justice to such a reproducer. Ask your dealer to demonstrate a Rola G.12 and let your ear confirm our claims.

Here you find 6 models, 2 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from British Rola Co. Ltd.; London