The set uses American
UX-based valves... I think it's a model "255". In the
early 30's there was considerable opposition by British setmakers
to foreign sets being sold in the UK and they used all sorts
of ploys to make things difficult including banning sales of
the American valves the sets needed as spare parts. Interestingly
the example above in its valve line up has a British type sitting
on top of an adaptor converting its base pins to fit the UX holder.
Although the American manufacturer had added a Long Waveband,
which wasn't used in the USA, he presumably hadn't checked on
the British custom of dial marking. All the usual stations are
marked on the dial but the user would have been confused as the
dial shows "Kilocycles" rather than the customary "Metres".
Bournemouth shown as "1500" and Droitwich as "200"
must have caused some confusion.
Valve line up (of the
original set) is: 1C6 Pentagrid frequency changer, 1A4E Pentode,
2102 Double diode Triode and a 2103 Push pull output stage